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Posted: 6/16/2024 11:12:38 PM EDT
[Last Edit: tortilla-flats]
I am in the process of building an 8" .300BO (for home defense) but recently have seen a few posts referencing the 6.8 SPC.
I remember this cartridge being introduced back in the day and watching the "wars" with variations and the Grendel being introduced about the same time. I had thought the cartridge had faded into obscurity but apparently not. So would this be a better choice in caliber over the 300BO? |
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Posted: 6/17/2024 12:23:44 AM EDT
[#1]
NO
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WA, USA
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Posted: 6/17/2024 1:11:20 AM EDT
[#2]
For a dedicated supressor host the 300 is better. Finding ammo is getting difficult for the 6.8 but it is a great sbr round.
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Posted: 6/17/2024 2:08:56 AM EDT
[#3]
In an 8" they seem to perform very similarly using 110Gr supers (2000 to 2100FPS is what is commonly reported)
For an 8" home defense gun .300BLK is king IMO. If you want a gun for a bit longer distance than that with a bit more barrel, that's where the 6.8 and 6.5 start to come more into play in my opinion. |
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Posted: 6/17/2024 7:30:30 AM EDT
[Last Edit: jwlaxton]
[#4]
Quote HistoryOriginally Posted By tortilla-flats: I am in the process of building an 8" .300BO (for home defense) but recently have seen a few posts referencing the 6.8 SPC. I remember this cartridge being introduced back in the day and watching the "wars" with variations and the Grendel being introduced about the same time. I had thought the cartridge had faded into obscurity but apparently not. So would this be a better choice in caliber over the 300BO? With factory ammo, 110gr supers will be 150 to 200 fps faster with 6.8 SPC out of an 8" to 8.5" barrel. Better options than 110gr bullets might be 90gr, 95gr, or 105gr bullets. Bison Armory makes an 8.5" 6.8 SPC barrel, but I prefer at least 10.5" barrels for the 6.8 SPC cartridge. For 300 Blackout, I prefer 8". There are more powerful rounds than 300 Blackout, including 300 Ham'r, 6.8 SPC, and 30 HRT. It just depends on what you want. |
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Posted: 6/17/2024 8:11:50 AM EDT
[#5]
For your purposes, 300blk.
This from a 6.8 fan. |
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Posted: 6/17/2024 8:23:09 AM EDT
[Last Edit: jwlaxton]
[#6]
Quote HistoryOriginally Posted By RDTCU: For your purposes, 300blk. This from a 6.8 fan. Home Defense is a broad category. HD in a rural area with 100+ acres? HD in an Apartment building? |
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Posted: 6/17/2024 8:29:46 AM EDT
[#7]
Suburbia.
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TX, USA
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Posted: 6/17/2024 9:18:37 AM EDT
[Last Edit: lilMAC25]
[#8]
Quote HistoryOriginally Posted By RDTCU: For your purposes, 300blk. This from a 6.8 fan. Agreed. Ive got 3 short (12.5, 9, 9) 300 BLK uppers and I have a hankering for an 11.5”-14.5” 6.8SPCII rifle. Just not sure there is a source of 90gr -100gr projectiles available for the 6.8 (where it shines from what I’ve read). |
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Posted: 6/17/2024 9:34:22 AM EDT
[#9]
Quote HistoryOriginally Posted By lilMAC25: Agreed. Ive got 3 short (12.5, 9, 9) 300 BLK uppers and I have a hankering for an 11.5”-14.5” 6.8SPCII rifle. Just not sure there is a source of 90gr -100gr projectiles available for the 6.8 (where it shines from what I’ve read). I've recently bought 90gr TNT, 95gr TTSX, and 105gr MKZ so I know they are available. I'm not sure what else is at the moment. I have a hard time recommending just one cartridge/barrel length, I've tried multiple. There are pros and cons to all of them. |
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Posted: 6/17/2024 9:57:45 AM EDT
[#10]
For your purposes I'd stick with the 300 BO.
6.8 is a good SBR round though and is a good choice for hunting with an AR15. |
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MN, USA
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Posted: 6/17/2024 10:29:47 AM EDT
[#11]
6.8 makes practically zero sense in an 8" barrel. It is a great cartridge, but needs some steel to perform as it can.
If going to suppress it makes less than zero sense. 300 BLK shines there |
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Posted: 6/17/2024 10:57:22 AM EDT
[Last Edit: jwlaxton]
[#12]
Originally Posted By s4s4u: 6.8 makes practically zero sense in an 8" barrel. It is a great cartridge, but needs some steel to perform as it can. If going to suppress it makes less than zero sense. 300 BLK shines there Suppressors aren't limited to shooting subsonic. I was recently shooting a 16" 30 HRT at a range with a Nomad Ti on it. Someone commented how quiet it was, and asked if it was 300 blackout. I laughed and let them know it was a 30 HRT pushing 125 gr TNTs between 2650 and 2700 fps out of the muzzle. I suppress almost every rifle I shoot. |
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LA, USA
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Posted: 6/17/2024 11:21:33 AM EDT
[Last Edit: TonyAngel]
[#13]
Is it your intention to run subs suppressed? If so, 300BO is the way to go. If you're gonna run supers suppressed, I'd just go 10.5 or 11.5 5.56 and save the money on ammo. Even shorter barrels with 5.56 and good ammo that is still less expensive than good 300 ammo will be effective for HD.
At 8" your going to get right at or under 2000 fps with 110s out of the blackout. I just went through this myself and once I got the excitement of 300BO out of my system and started looking at things rationally, I decided it wasn't best for me. I've relegated my 300 to shooting hogs... suppressed with supers. Just to be clear, I'm not saying that one or the other is going to be more effective at HD distances. I'm just saying that either will do for shooting supers and 5.56 is almost half the cost of 300 for practice ammo and you can stack 5.56 at the price it is available for. Can't comment on 6.8 except to say that the right suppressor can work wonders. A guy at the range runs one with a Vox S and it's pretty not loud. |
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NC, USA
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Posted: 6/17/2024 12:34:07 PM EDT
[Last Edit: 9D1Alpha]
[#14]
Quote HistoryOriginally Posted By jwlaxton: With factory ammo, 110gr supers will be 150 to 200 fps faster with 6.8 SPC out of an 8" to 8.5" barrel. Better options than 110gr bullets might be 90gr, 95gr, or 105gr bullets. Bison Armory makes an 8.5" 6.8 SPC barrel, but I prefer at least 10.5" barrels for the 6.8 SPC cartridge. For 300 Blackout, I prefer 8". There are more powerful rounds than 300 Blackout, including 300 Ham'r, 6.8 SPC, and 30 HRT. It just depends on what you want. Quote HistoryOriginally Posted By jwlaxton: Originally Posted By tortilla-flats: I am in the process of building an 8" .300BO (for home defense) but recently have seen a few posts referencing the 6.8 SPC. I remember this cartridge being introduced back in the day and watching the "wars" with variations and the Grendel being introduced about the same time. I had thought the cartridge had faded into obscurity but apparently not. So would this be a better choice in caliber over the 300BO? With factory ammo, 110gr supers will be 150 to 200 fps faster with 6.8 SPC out of an 8" to 8.5" barrel. Better options than 110gr bullets might be 90gr, 95gr, or 105gr bullets. Bison Armory makes an 8.5" 6.8 SPC barrel, but I prefer at least 10.5" barrels for the 6.8 SPC cartridge. For 300 Blackout, I prefer 8". There are more powerful rounds than 300 Blackout, including 300 Ham'r, 6.8 SPC, and 30 HRT. It just depends on what you want. There is also the 277wolverine. It also has a sliver of advantage over the 30hrt in that it's still boutique shop loaded ...and bbls still available . Its somewhat goldilocks between 300bo and 6.8spc . 9/10ths spc and 11/10ths bo . * keeps bolt , brass , and mags . Has good sub capabilities. |
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Posted: 6/17/2024 12:48:28 PM EDT
[#15]
Quote HistoryOriginally Posted By RDTCU: For your purposes, 300blk. This from a 6.8 fan. Agree. 6.8 is a fantastic round but in that situation im grabbing my 300blk |
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Posted: 6/17/2024 12:54:16 PM EDT
[#16]
Quote HistoryOriginally Posted By 9D1Alpha: There is also the 277wolverine. It also has a sliver of advantage over the 30hrt in that it's still boutique shop loaded ...and bbls still available . Its somewhat goldilocks between 300bo and 6.8spc . 9/10ths spc and 11/10ths bo . * keeps bolt , brass , and mags . Has good sub capabilities. Quote HistoryOriginally Posted By 9D1Alpha: Originally Posted By jwlaxton: Originally Posted By tortilla-flats: I am in the process of building an 8" .300BO (for home defense) but recently have seen a few posts referencing the 6.8 SPC. I remember this cartridge being introduced back in the day and watching the "wars" with variations and the Grendel being introduced about the same time. I had thought the cartridge had faded into obscurity but apparently not. So would this be a better choice in caliber over the 300BO? With factory ammo, 110gr supers will be 150 to 200 fps faster with 6.8 SPC out of an 8" to 8.5" barrel. Better options than 110gr bullets might be 90gr, 95gr, or 105gr bullets. Bison Armory makes an 8.5" 6.8 SPC barrel, but I prefer at least 10.5" barrels for the 6.8 SPC cartridge. For 300 Blackout, I prefer 8". There are more powerful rounds than 300 Blackout, including 300 Ham'r, 6.8 SPC, and 30 HRT. It just depends on what you want. There is also the 277wolverine. It also has a sliver of advantage over the 30hrt in that it's still boutique shop loaded ...and bbls still available . Its somewhat goldilocks between 300bo and 6.8spc . 9/10ths spc and 11/10ths bo . * keeps bolt , brass , and mags . Has good sub capabilities. I've thought about trying one a few times, but never did. |
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TX, USA
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Posted: 6/17/2024 1:26:53 PM EDT
[Last Edit: lilMAC25]
[#17]
Quote HistoryOriginally Posted By jwlaxton: I've recently bought 90gr TNT, 95gr TTSX, and 105gr MKZ so I know they are available. I'm not sure what else is at the moment. I have a hard time recommending just one cartridge/barrel length, I've tried multiple. There are pros and cons to all of them. Quote HistoryOriginally Posted By jwlaxton: Originally Posted By lilMAC25: Agreed. Ive got 3 short (12.5, 9, 9) 300 BLK uppers and I have a hankering for an 11.5”-14.5” 6.8SPCII rifle. Just not sure there is a source of 90gr -100gr projectiles available for the 6.8 (where it shines from what I’ve read). I've recently bought 90gr TNT, 95gr TTSX, and 105gr MKZ so I know they are available. I'm not sure what else is at the moment. I have a hard time recommending just one cartridge/barrel length, I've tried multiple. There are pros and cons to all of them. Sorry, I should have been more clear… reasonably priced 90-100 gr bonded projectiles (for hunting). TTSX and MKZ are very expensive projectiles. TNT is a decent price projectile at $0.25/ea. |
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NC, USA
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Posted: 6/17/2024 1:38:21 PM EDT
[#18]
Quote HistoryOriginally Posted By jwlaxton: I've thought about trying one a few times, but never did. Quote HistoryOriginally Posted By jwlaxton: Originally Posted By 9D1Alpha: Originally Posted By jwlaxton: Originally Posted By tortilla-flats: I am in the process of building an 8" .300BO (for home defense) but recently have seen a few posts referencing the 6.8 SPC. I remember this cartridge being introduced back in the day and watching the "wars" with variations and the Grendel being introduced about the same time. I had thought the cartridge had faded into obscurity but apparently not. So would this be a better choice in caliber over the 300BO? With factory ammo, 110gr supers will be 150 to 200 fps faster with 6.8 SPC out of an 8" to 8.5" barrel. Better options than 110gr bullets might be 90gr, 95gr, or 105gr bullets. Bison Armory makes an 8.5" 6.8 SPC barrel, but I prefer at least 10.5" barrels for the 6.8 SPC cartridge. For 300 Blackout, I prefer 8". There are more powerful rounds than 300 Blackout, including 300 Ham'r, 6.8 SPC, and 30 HRT. It just depends on what you want. There is also the 277wolverine. It also has a sliver of advantage over the 30hrt in that it's still boutique shop loaded ...and bbls still available . Its somewhat goldilocks between 300bo and 6.8spc . 9/10ths spc and 11/10ths bo . * keeps bolt , brass , and mags . Has good sub capabilities. I've thought about trying one a few times, but never did. I also had a 6.8x42 based off of cut down 7mm tcu brass and dies that Kurt (7.62x40) did for me years ago . Would've been great with 300bo mags . |
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TX, USA
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Posted: 6/17/2024 3:41:22 PM EDT
[#19]
300 BO offers a wide range of super and subsonic home defense loads. From 220g nasty, nasty full expanding petal organ shredders, to 110g supersonic ethical deer killers, it's got options for you.
Also, as 300 BO has become more popular, over the past 1-2 years we've seen prices for 300 BO training/plinking ammo go down significantly. 6.8 SPC is a very cool round, but I would recommend sticking with 300 BO for the cost and flexibility it provides from an 8" barrel. |
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Posted: 6/17/2024 3:49:39 PM EDT
[#20]
Quote HistoryOriginally Posted By TonyAngel: Is it your intention to run subs suppressed? If so, 300BO is the way to go. If you're gonna run supers suppressed, I'd just go 10.5 or 11.5 5.56 and save the money on ammo. Even shorter barrels with 5.56 and good ammo that is still less expensive than good 300 ammo will be effective for HD. At 8" your going to get right at or under 2000 fps with 110s out of the blackout. I just went through this myself and once I got the excitement of 300BO out of my system and started looking at things rationally, I decided it wasn't best for me. I've relegated my 300 to shooting hogs... suppressed with supers. Just to be clear, I'm not saying that one or the other is going to be more effective at HD distances. I'm just saying that either will do for shooting supers and 5.56 is almost half the cost of 300 for practice ammo and you can stack 5.56 at the price it is available for. Can't comment on 6.8 except to say that the right suppressor can work wonders. A guy at the range runs one with a Vox S and it's pretty not loud. Why so dismissive as to the benefit of reduced overall length? The main reason I'm here is because a suppressed 6933 (I have one) is 16". By extrapolation, I should just use a 6920. As far as ammo cost, it's not a calculation in this context. |
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Posted: 6/17/2024 6:20:45 PM EDT
[#21]
Quote HistoryOriginally Posted By tortilla-flats: I would run supers suppressed. Why so dismissive as to the benefit of reduced overall length? The main reason I'm here is because a suppressed 6933 (I have one) is 16". By extrapolation, I should just use a 6920. As far as ammo cost, it's not a calculation in this context. Quote HistoryOriginally Posted By tortilla-flats: Originally Posted By TonyAngel: Is it your intention to run subs suppressed? If so, 300BO is the way to go. If you're gonna run supers suppressed, I'd just go 10.5 or 11.5 5.56 and save the money on ammo. Even shorter barrels with 5.56 and good ammo that is still less expensive than good 300 ammo will be effective for HD. At 8" your going to get right at or under 2000 fps with 110s out of the blackout. I just went through this myself and once I got the excitement of 300BO out of my system and started looking at things rationally, I decided it wasn't best for me. I've relegated my 300 to shooting hogs... suppressed with supers. Just to be clear, I'm not saying that one or the other is going to be more effective at HD distances. I'm just saying that either will do for shooting supers and 5.56 is almost half the cost of 300 for practice ammo and you can stack 5.56 at the price it is available for. Can't comment on 6.8 except to say that the right suppressor can work wonders. A guy at the range runs one with a Vox S and it's pretty not loud. Why so dismissive as to the benefit of reduced overall length? The main reason I'm here is because a suppressed 6933 (I have one) is 16". By extrapolation, I should just use a 6920. As far as ammo cost, it's not a calculation in this context. This is correct. A suppressed 5.56 SBR is as long as a rifle. .300 can be a good bit shorter, while still having effective ballistics. |
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Posted: 6/22/2024 1:44:24 PM EDT
[#22]
If you want to go as short as possible, I would probably choose 300BLK; in fact I did. In your case it probably comes down to the importance of logistics vs performance. I liked the fact that 300BLK has everything in common with 5.56 except the barrel. I think 6.8SPC supers will give you better performance for a given barrel length, but now you need new mags and bolts in addition to the barrel.
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IL, USA
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Posted: 6/22/2024 6:47:43 PM EDT
[#23]
At that particular barrel length, 300blk.
Decent 110gr supers should be roughly 2100 fps. |
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Posted: 6/22/2024 9:06:50 PM EDT
[#24]
was just perusing Scheels retail shelves and noticed that 6.8 spc Hornady black was only 200fps slower than 300blk per specs printed on the box.
so, 6.8 spc is still downloaded. 300blk might be hot. |
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Posted: 6/22/2024 11:24:44 PM EDT
[#25]
Quote HistoryOriginally Posted By racer765: was just perusing Scheels retail shelves and noticed that 6.8 spc Hornady black was only 200fps slower than 300blk per specs printed on the box. so, 6.8 spc is still downloaded. 300blk might be hot. It should be about 200FPS or more faster out of a 16" barrel. As I'm sure you know, the manufacturer's stated velocity is often very different from what you can realistically expect as a user. |
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NC, USA
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Posted: 6/22/2024 11:42:54 PM EDT
[#26]
Ballistically, between 300 , spc , and wolverine, there isn't much difference short bbl . Wolverine will come out on top economilly, and then 300 , ... trailing will be spc .
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Posted: 6/22/2024 11:53:45 PM EDT
[#27]
I prefer 6.8 for supers and .300 for subs.
But I would go whole hog and run a LWRC Six8 receiver set for better mags and a nice ambidextrous lower. |
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NM, USA
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Posted: 6/22/2024 11:57:12 PM EDT
[#28]
For 8" go 300 BLK.
Now, over 12.5" the 6.8 really starts to shine. |
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Posted: 6/23/2024 6:07:20 AM EDT
[#29]
300 BO for short range and/or suppressed.
6.8 for everything else. I have both. |
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Posted: 6/23/2024 8:52:00 AM EDT
[#30]
Both are awesome cartridges.
As most have said, under 11.5-12" I love how well a pistol gas 300 blackout runs with subs.. A 12" 6.8 is a very nasty round loaded correctly. Then again with supers a 300 Blk spitting out 110 Barnes TAC-TX performs way above it's powder charge has any right too. |
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Posted: 6/24/2024 12:52:49 AM EDT
[#31]
I have a 9” Blackout SBR that’s mostly for fun.
Not too long ago I decided I wanted more than a 9mm when traveling so built an 8” Blackout with a Law Tactical folder so I can fit it in a small backpack. I do like the idea of a 6.8, but not from only 8” of barrel. Who was the guy who regularly posted about his success with a 6.8 on a Texas ranch? I appreciated his insight. |
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Posted: 6/24/2024 7:07:33 AM EDT
[#32]
Not to dissuade you, but I’m always curious what leads people to believe (other than training and experience or lack thereof) that they need such a short gun for home defense in the first place. Certainly it will work, and I vote .300AAC for this exercise.
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Posted: 6/24/2024 8:19:28 AM EDT
[#33]
Quote HistoryOriginally Posted By 1168RGR: Not to dissuade you, but I’m always curious what leads people to believe (other than training and experience or lack thereof) that they need such a short gun for home defense in the first place. Certainly it will work, and I vote .300AAC for this exercise. In my case, matches that involve a shoothouses and vehicles convinced me that my HD rifle: -needs a can -needs to be compact The two tend to work against each other unless you're willing to go short, at which point you need to look at other calibers like 300BO. Having used it on deer and hogs with good results (Barnes 110gr), that's where i settled... |
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IL, USA
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Posted: 6/24/2024 9:03:26 AM EDT
[#34]
Quote HistoryOriginally Posted By 1168RGR: Not to dissuade you, but I’m always curious what leads people to believe (other than training and experience or lack thereof) that they need such a short gun for home defense in the first place. Certainly it will work, and I vote .300AAC for this exercise. Between the confined space of a home, and/or having the weapon in a vehicle, and/or adding a suppressor, I can't think of a reason to go long(er) unless you have other specific needs. When you consider the excellent short barrel characteristics and solid terminal ballistics (especially at closer ranges), it just makes sense. |
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Posted: 6/24/2024 9:55:37 AM EDT
[#35]
Keep in mind, I believe that in America, you should be able to have/use whatever you see fit, so I’m not criticizing your choice or telling you what you do or don’t need. I’m just always curious about setting, scenario, tactics, technique, experience, and training that leads y’all down this path.
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Posted: 6/24/2024 7:36:44 PM EDT
[#36]
Common sense.
Ideally, one would arm themselves with the smallest, lightest weapon possible that has the necessary terminal ballistics for the job. Everything else is just a necessary adaptation due to the compromises put upon us by the limitations of what is possible/reasonable/practical. Example: Who would purposely choose a 20" AR with iron sights and 1/12 twist given today's choices? Is there a training and/or experience regimen needed to arrive at a valid conclusion? At the end of the day, its my funeral.  |
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TX, USA
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Posted: 6/30/2024 11:18:29 PM EDT
[#37]
6.8 ammo was much more plentiful a few years ago and I wish there was more available. I'm stocking up now as it seems to be drying up everywhere and I have 2 reliable hungry mouths to feed.
I'm slowly building an SBR myself and I'm nearly at a point where I have to select caliber. I'm teetering on the 9.5" .300 or a 11.3" 6.8. I'll probably do a .300 since ammo is more plentiful and when 6.8 drys up completely I will swap my 16" 6.8s to something easier to get. 6.8 has worked for me for years as a hell of a pig/deer round. 120SSTs are great deer and pig medicine. 110grn vmax would be a badass HD round. 6.8 is a fantastic round to kill things with. Unfortunately there has been a big shift away from it in the industry. |
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Posted: 6/30/2024 11:34:53 PM EDT
[Last Edit: Luny421]
[#38]
Quote HistoryOriginally Posted By Missilegeek: It should be about 200FPS or more faster out of a 16" barrel. As I'm sure you know, the manufacturer's stated velocity is often very different from what you can realistically expect as a user. For a given bullet weight and equal barrel length, 6.8SPC should be faster than 300blk owing to greater case capacity. The printed specs on factory ammo is based on SAAMI spec test barrel length unless otherwise stated (Federal Fusion vs Fusion MSR is an example where the MSR loading deviates from SAAMI test barrel length for 223Rem).The SAAMI spec test barrel length for both 300blk and 6.8SPC is 16”, most rifle calibers have test barrel lengths of 24”. It’s the reason that stated velocity comparisons of 6.5G vs 6.8SPC for a given bullet weight aren’t apples to apples. For example, factory 120gr SST for 6.8 lists a MV of 2460fps, while 120gr SST for 6.5G lists a MV of 2700fps. One is from a 16” barrel, the other from a 24” barrel. |
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MD, USA
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Posted: 7/1/2024 12:15:13 PM EDT
[#39]
I am currently building an AR pistol in. 350 Legend. It makes more sense to me than the BO, or any of the others.
It works fine in a short barrel, seems to be easy to load, and is legal for deer in my formerly shotgun only state. I also can't blow myself up by sticking the round into a. 223 gun. |
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Posted: 7/1/2024 5:47:56 PM EDT
[#40]
I have both calibers and both with an 8.5" barrel. I will try to get some numbers with the chronograph this weekend. I'm interested to see what the velocity difference is between them, shooting 110-115 gr pills.
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NC, USA
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Posted: 7/3/2024 12:35:36 AM EDT
[#41]
Quote HistoryOriginally Posted By fulautotank: I have both calibers and both with an 8.5" barrel. I will try to get some numbers with the chronograph this weekend. I'm interested to see what the velocity difference is between them, shooting 110-115 gr pills. I should get some numbers on my 277wolverine 9.25" . I have 95ttsx and 100 accubond ... |
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Posted: 7/5/2024 3:24:17 PM EDT
[#42]
These are all factory loads tested.
All 6.8 was fired through an 8.5" Bison Amory 1:7 twist barrel All 300 blkout was fired through an 8.5" Noveske 1:7 twist barrel. 6.8 SSA 115 gr ball 2206 fps 6.8 SSA 110 Nosler Accubond 2229 fps 6.8 SSA 95 TTSX 2415 fps 6.8 Hornady 120 SST 2073 fps 6.8 SSA Barnes 85 TSX 2654 fps 300blk Barnes 110 VOR-TX TAC TX 2128 fps. I only had the one type of 300 blkout but imo is the round used by most for hunting applications. I really like the. 6.8 85 gr TSX. That is my go to round for hunting deer and hogs. |
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Posted: 7/6/2024 12:13:45 AM EDT
[#43]
Ful, I have to admit those are better numbers than I expected. The 6.8 does have a respectable powder capacity advantage compared to the 300.
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NM, USA
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Posted: 7/7/2024 5:37:36 PM EDT
[Last Edit: badkarmaiii]
[#44]
Quote HistoryOriginally Posted By Scott_S: Ful, I have to admit those are better numbers than I expected. The 6.8 does have a respectable powder capacity advantage compared to the 300. Those SSA loads were hotter than you're likely to find today. 8" 300BLK is almost ideal. Could also go Kel-Tec RDB Defender. Has a 16.1" 5.56 barrel and is under 25" with stock collapsed, which I would never extend anyway, as it's a 14" length of pull collapsed. No NFA or pistol brace shenanigans. Ejection port on the bottom and adjustable gas make it pleasant suppressed. Mine is the 20.5" version and it's about 8" longer than my 8" 300BLK, with the stock partially extended, both wearing the same cans. The Defender's shorter length would shrink that to about 4" longer for double the barrel length. Also on my list is a Foxtrot Mike FM-15 9" barrel 300BLK upper on a railed lower with a folder. It can replace both my 6" and 8" 300BLK PDWs. 18.5" OAL while folded, same as my 6" with a Troy Tomahawk Short stock collapsed, but with about 7" of rifled barrel vs 4". Nice boost in velocity and energy, plus more rail space for stuff. |
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NC, USA
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Posted: 7/7/2024 7:52:45 PM EDT
[#45]
Quote HistoryOriginally Posted By badkarmaiii: Those SSA loads were hotter than you're likely to find today. 8" 300BLK is almost ideal. Could also go Kel-Tec RDB Defender. Has a 16.1" 5.56 barrel and is under 25" with stock collapsed, which I would never extend anyway, as it's a 14" length of pull collapsed. No NFA or pistol brace shenanigans. Ejection port on the bottom and adjustable gas make it pleasant suppressed. Mine is the 20.5" version and it's about 8" longer than my 8" 300BLK, with the stock partially extended, both wearing the same cans. The Defender's shorter length would shrink that to about 4" longer for double the barrel length. Also on my list is a Foxtrot Mike FM-15 9" barrel 300BLK upper on a railed lower with a folder. It can replace both my 6" and 8" 300BLK PDWs. 18.5" OAL while folded, same as my 6" with a Troy Tomahawk Short stock collapsed, but with about 7" of rifled barrel vs 4". Nice boost in velocity and energy, plus more rail space for stuff. Quote HistoryOriginally Posted By badkarmaiii: Originally Posted By Scott_S: Ful, I have to admit those are better numbers than I expected. The 6.8 does have a respectable powder capacity advantage compared to the 300. Those SSA loads were hotter than you're likely to find today. 8" 300BLK is almost ideal. Could also go Kel-Tec RDB Defender. Has a 16.1" 5.56 barrel and is under 25" with stock collapsed, which I would never extend anyway, as it's a 14" length of pull collapsed. No NFA or pistol brace shenanigans. Ejection port on the bottom and adjustable gas make it pleasant suppressed. Mine is the 20.5" version and it's about 8" longer than my 8" 300BLK, with the stock partially extended, both wearing the same cans. The Defender's shorter length would shrink that to about 4" longer for double the barrel length. Also on my list is a Foxtrot Mike FM-15 9" barrel 300BLK upper on a railed lower with a folder. It can replace both my 6" and 8" 300BLK PDWs. 18.5" OAL while folded, same as my 6" with a Troy Tomahawk Short stock collapsed, but with about 7" of rifled barrel vs 4". Nice boost in velocity and energy, plus more rail space for stuff. Because remington botched SAAMI, most factory loads will err towards the 54ksi loading . Another reason 277wolverine is a good option . |
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NM, USA
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Posted: 7/7/2024 11:21:25 PM EDT
[Last Edit: badkarmaiii]
[#46]
Quote HistoryOriginally Posted By 9D1Alpha: Because remington botched SAAMI, most factory loads will err towards the 54ksi loading . Another reason 277wolverine is a good option . Quote HistoryOriginally Posted By 9D1Alpha: Originally Posted By badkarmaiii: Originally Posted By Scott_S: Ful, I have to admit those are better numbers than I expected. The 6.8 does have a respectable powder capacity advantage compared to the 300. Those SSA loads were hotter than you're likely to find today. 8" 300BLK is almost ideal. Could also go Kel-Tec RDB Defender. Has a 16.1" 5.56 barrel and is under 25" with stock collapsed, which I would never extend anyway, as it's a 14" length of pull collapsed. No NFA or pistol brace shenanigans. Ejection port on the bottom and adjustable gas make it pleasant suppressed. Mine is the 20.5" version and it's about 8" longer than my 8" 300BLK, with the stock partially extended, both wearing the same cans. The Defender's shorter length would shrink that to about 4" longer for double the barrel length. Also on my list is a Foxtrot Mike FM-15 9" barrel 300BLK upper on a railed lower with a folder. It can replace both my 6" and 8" 300BLK PDWs. 18.5" OAL while folded, same as my 6" with a Troy Tomahawk Short stock collapsed, but with about 7" of rifled barrel vs 4". Nice boost in velocity and energy, plus more rail space for stuff. Because remington botched SAAMI, most factory loads will err towards the 54ksi loading . Another reason 277wolverine is a good option . I built a 12.5" 277 WLV upper thanks to my buddy, elkbow. He even loaded a couple hundred rounds of 85gr ammo for me. I've only shot it twice, and feel guilty about it. I wish SAAMI had standardized the WLV, so we could get cheap barrels and ammo, but I understand there's a lot of money involved. Maybe some day... ETA: Checked my upper and is a 1:11 twist, pistol gas. Damn. Guess it's supers only for this upper. At least the barrel was $99 (years ago) and elkbow gave me everything but the handguard, muzzle device, sights, optic, Cerakote, and mag ID bands. It deserves to be a mainstream cartridge. |
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Posted: 7/10/2024 12:12:28 PM EDT
[#47]
My 300 Blackout with 8" barrel and muzzle brake with a Law Tactical folder comes in right at 19" folded. The K can adds only 3.5" to that length.
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NC, USA
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Posted: 7/17/2024 10:57:28 PM EDT
[#48]
Quote HistoryOriginally Posted By badkarmaiii: I built a 12.5" 277 WLV upper thanks to my buddy, elkbow. He even loaded a couple hundred rounds of 85gr ammo for me. I've only shot it twice, and feel guilty about it. I wish SAAMI had standardized the WLV, so we could get cheap barrels and ammo, but I understand there's a lot of money involved. Maybe some day... ETA: Checked my upper and is a 1:11 twist, pistol gas. Damn. Guess it's supers only for this upper. At least the barrel was $99 (years ago) and elkbow gave me everything but the handguard, muzzle device, sights, optic, Cerakote, and mag ID bands. It deserves to be a mainstream cartridge. Quote HistoryOriginally Posted By badkarmaiii: Originally Posted By 9D1Alpha: Originally Posted By badkarmaiii: Originally Posted By Scott_S: Ful, I have to admit those are better numbers than I expected. The 6.8 does have a respectable powder capacity advantage compared to the 300. Those SSA loads were hotter than you're likely to find today. 8" 300BLK is almost ideal. Could also go Kel-Tec RDB Defender. Has a 16.1" 5.56 barrel and is under 25" with stock collapsed, which I would never extend anyway, as it's a 14" length of pull collapsed. No NFA or pistol brace shenanigans. Ejection port on the bottom and adjustable gas make it pleasant suppressed. Mine is the 20.5" version and it's about 8" longer than my 8" 300BLK, with the stock partially extended, both wearing the same cans. The Defender's shorter length would shrink that to about 4" longer for double the barrel length. Also on my list is a Foxtrot Mike FM-15 9" barrel 300BLK upper on a railed lower with a folder. It can replace both my 6" and 8" 300BLK PDWs. 18.5" OAL while folded, same as my 6" with a Troy Tomahawk Short stock collapsed, but with about 7" of rifled barrel vs 4". Nice boost in velocity and energy, plus more rail space for stuff. Because remington botched SAAMI, most factory loads will err towards the 54ksi loading . Another reason 277wolverine is a good option . I built a 12.5" 277 WLV upper thanks to my buddy, elkbow. He even loaded a couple hundred rounds of 85gr ammo for me. I've only shot it twice, and feel guilty about it. I wish SAAMI had standardized the WLV, so we could get cheap barrels and ammo, but I understand there's a lot of money involved. Maybe some day... ETA: Checked my upper and is a 1:11 twist, pistol gas. Damn. Guess it's supers only for this upper. At least the barrel was $99 (years ago) and elkbow gave me everything but the handguard, muzzle device, sights, optic, Cerakote, and mag ID bands. It deserves to be a mainstream cartridge. Mines 1:11 also . Picked up on sale back around 2016 for $80. This thread has renewed my interest in it a bit . I've got 90 gd and tnt , 95 ttsx , 100 accubond . Need to try some 130gr RN hawk |
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Posted: 7/18/2024 8:29:55 AM EDT
[#49]
 Attached File8.5” 1-7 barrel’d 300 is my nightstand gun as well. And I went even shorter for the backpacker  Attached FileSure it may only have the energy of a hopped up 45 with subs, but that’s all thats needed. I did love my 6.8, but 300bo makes more sense for this to me. |
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AL, USA
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Posted: 7/18/2024 8:59:36 AM EDT
[#50]
I own Hog Rush, LLC.
I’ve also been a NFA gunsmith since 2000. I just surpassed killing 10,000 wild hogs. Confirmed “step on” kills. All free range rifle killed with maybe 200 pistol/subgun kills. Early on I did lots of testing with various mouse gun calibers, bullet weights, brands, etc. I’ve done countless bullet extractions, hanging dead carcass shoots, various barrel length tests, steel plate penetration tests, barrel length velocity comparisons, etc Grendel, 6.8SPC, 5.56x45mm, 7.62x39, 300whisper/blk 9mm, .40s&w , 22 Valkyrie 300BLK performed way worse than any other calibers. So much so, I don’t so much as own an upper chambered in the caliber. I really wanted 300BLK to work. Spent lots of time, effort, and money looking for the right combo. Back when I started this endeavor Hog Hunting at night and the 300blk were very new to the masses. It was called “The best hog hunting caliber”. I soon realized that was just propaganda put out by folks like Ron Silvers, the guy connected with AAC at the time who helped get SAAMI spec for the 300whisper aka 300BLK and we’re tied in with Remington which both companies were soon after bought by Cerebrus holdings. These folks had never seen a Hog in the wild. Let alone kill one and done any field testing. I soon realized it was not the killer round that they painted it up to be, was a 50yd gun, and the only ammo that would shoot sub 3moa groups was handloads and factory loaded Hornady. In closing, inside 75 yards, 110gr rounds in a 16” barrel will do fine. Just keep in mind, there’s a wall there in terms of consistency and it’s a crap shoot further than that. |
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