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[ARCHIVED THREAD] - New AR Chambering: .375 Reaper (Page 1 of 5)
Posted: 6/19/2014 1:59:03 AM EDT
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Found this on Facebook today, figured I'd share. I'm not affiliated with these guys, just like what I see.
.375 Reaper. Supersonic and subsonic loads to be offered. Their FB Page https://www.facebook.com/W3PrecisionSystems 
.375 Reaper next to a .300 Blackout 
15 rounds staggered, per mag. 
.308-based case. 
Left to Right: .223 Remington, .300 Blackout, .375 Reaper You now know as much as I do. I will also let the W3PS guys know about this post. Best, JBR |
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I started playing with a similar design after the .458 SOCOM came out (using SOCOM brass). I like the idea of using .308 brass much more! Agreed. Already ordered a 458 can so could use it with this when it arrives. Love the 308 brass concept... better than 338 specter unless i'm missing something. Already have compatible bolts given 45acp and 458s uppers. ETA: They have a website: https://whiskey3precisionsystems.com/ |
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Cool. Big, subsonic pills interest me.
Tony Rumore has a similar round based on the auto mag case, the 375 AMP. Tony's design will handle the big 350 grain Sierra HPBT. Looks like the Reaper probably has more powder capacity for supers, but the longer case might not be able to handle the 375 grn Sierra. |
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Wondering why? What kind of cans would y'all use? Pill is too wide, for 30 cans. Pressure is probably too high for those 45 cans that are rated for 300 subs. So, this is a new category of can, or this forces use of those heavy and expensive big bore cans. So, what's the benefit of a wider than 30 sub rifle? Even 338-rated cans wouldn't cut the mustard... Just wondering?
As a thumper, for supers, I get it. I'm just not getting the warm and fuzzy for subs, based on can compatability. Quoted:
Cool. Big, subsonic pills interest me. Tony Rumore has a similar round based on the auto mag case, the 375 AMP. Tony's design will handle the big 350 grain Sierra HPBT. Looks like the Reaper probably has more powder capacity for supers, but the longer case might not be able to handle the 375 grn Sierra. |
| 2200 FPS or not interested. I like the idea of using 308 brass, but it has to have some performance to make it worthwhile. All the 375 bullets in the lower weight class for this are in the 250 grain range. I think it is going to be a stretch to get it up to speed. |
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Mmmm, I don't think you'll get much expansion with bullets designed for the .375 H&H...custom bullets (thinking Lehigh Defense) possibly, but those get real expensive real fast. Another possibility would be bullets designed for the .38-55, but I'm thinking you'll run into feeding problems then. It might be very good as a subsonic load though, I'd have to look at the numbers and I'm too hung over to do that yet. Interesting project, nonetheless. |
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Wondering why? What kind of cans would y'all use? Pill is too wide, for 30 cans. Pressure is probably too high for those 45 cans that are rated for 300 subs. So, this is a new category of can, or this forces use of those heavy and expensive big bore cans. So, what's the benefit of a wider than 30 sub rifle? Even 338-rated cans wouldn't cut the mustard... Just wondering? As a thumper, for supers, I get it. I'm just not getting the warm and fuzzy for subs, based on can compatability. Offer a $300 barrel / bolt combo for this concept and I would probably be in for this caliber also: Regarding suppressor... would plan on one GTG with .458s supers: http://www.lane-products.com/products/scorpion-458.html |
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You can cut down .308 cases, neck ream and trim them into 44 Auto Mag cases, then run them into the .375 AMP die. But that is just a huge pain in the ass compared to buying 44AMP cases to begin with.
It will run in some standard mags, but not all of them. It runs perfectly in Sig 556 mags. Delta P Design makes a .375 suppressor for it and a Bowers CAC-9 can can be used for subsonic use only. At this point, we have no plans to produce anymore of them beyond the prototypes. Tony Rumore Tromix |
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Tony has bigger 458 fish to fry. I'm still interested in 375 Reaper and want more info on 308 brass conversion ease or difficulty and mag compatibility.
Assuming the answers to the above are favorable, I hope it is on the path to reasonable barrel/bolt combo offerings (and dies). |
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I now envision a switchbarrel Big Bore AR for myself that goes between .458 SOCOM and .375 Reaper whenever the mood suits me.
I will name it "Meow-meow." ;) (If you've seen the first Thor movie, you know what I mean.) If I really go over the top with it, I'll do it on a Sharps Hellbreaker lower, too. 
Best, JBR |
New Pics and updates.
Brass. 
Loaded Brass. Projected data for supersonics is to be "2300 and 2400 with our 190 and 200 grain flat base projos." Plug that into this ballistic calculator...http://www.shooterscalculator.com/bullet-kinetic-energy.php 2430 ft-lbs for the 190gr / 2400fps load. 2350 ft-lbs for the 200gr / 2300fps load. That puts it equal to or just ahead of the .260 Remington in KE. Nice. More as I get it. Best, JBR |
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New Pics and updates. https://scontent-a-sjc.xx.fbcdn.net/hphotos-xpa1/t1.0-9/p296x100/10502220_672487796134291_1665581403975123697_n.jpg Brass. https://scontent-a-sjc.xx.fbcdn.net/hphotos-xfp1/t1.0-9/10304771_672496252800112_3287142166073640530_n.jpg Loaded Brass. Projected data for supersonics is to be "2300 and 2400 with our 190 and 200 grain flat base projos." Plug that into this ballistic calculator...http://www.shooterscalculator.com/bullet-kinetic-energy.php 2430 ft-lbs for the 190gr / 2400fps load. 2350 ft-lbs for the 200gr / 2300fps load. That puts it equal to or just ahead of the .260 Remington in KE. Nice. More as I get it. Best, JBR .375 is a good mix of diameter, weight and BC for the AR platform, IMHO. I am definitely interested in this.... |
| I do not like the idea of having one source for lightweight bullets for this cartridge. 250 grains is the norm, not 190, or 200 which is being advertised as lightweight options to achieve the 2200 FPS threshold. Nice idea, but I like more options, and data for the reloader. There are 200 grain bullets out there, but they are flat nose for the .375 Win. which this seems to match as far as velocity. There is a real shortage of appropriate supersonic bullets for this round, and even less choices for a thin jacketed bullet this would need at the velocity they are being pushed. |
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Interesting, but I doubt it ever will take off like .300 BLK. You're looking at another can (most don't own a suppressor with a large enough bore diameter), and some big expensive bullets. And you though 220gr SMK's were expensive.... Hornady 270 gr spire points are $.356 @ Wideners, but as you can probably guess, out of stock. You can spend lots more than that if you want. But, yes, the suppressor will probably keep me out of this game. |
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I love novelties.
Evidently, you can convert an AR15 into almost any caliber. Other than the novel hobby element, I have trouble figuring what these novelties offer that you can't get better with an off-the-shelf AR in .308. I suppose somebody will mention the "sub-sonic" thing. OK. I'll give you that. Seems like an AWFUL LOT of trouble to go to only to convert a fast(er) round into a slow(er) round that offers not much more than what you would get from a suppressed .40 S&W or .45 ACP. |
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I love novelties. Evidently, you can convert an AR15 into almost any caliber. Other than the novel hobby element, I have trouble figuring what these novelties offer that you can't get better with an off-the-shelf AR in .308. I suppose somebody will mention the "sub-sonic" thing. OK. I'll give you that. Seems like an AWFUL LOT of trouble to go to only to convert a fast(er) round into a slow(er) round that offers not much more than what you would get from a suppressed .40 S&W or .45 ACP. Check the drop and velocity on a 230g .45 at 200yd vs a 220g .308 at the same muzzle velocity. And the fact that the barrel is the only thing required for a caliber swap with .300blk. Now this new round is a bit different, but it's still a standard ar platform other than barrel and bolt. |
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I love novelties. Evidently, you can convert an AR15 into almost any caliber. Other than the novel hobby element, I have trouble figuring what these novelties offer that you can't get better with an off-the-shelf AR in .308. I suppose somebody will mention the "sub-sonic" thing. OK. I'll give you that. Seems like an AWFUL LOT of trouble to go to only to convert a fast(er) round into a slow(er) round that offers not much more than what you would get from a suppressed .40 S&W or .45 ACP. Correct, Dr. Gary, it's more of a novelty, just like my Meeper switchbarrel FAL was. Not something to ride out the apocalypse with, more for hunting for bacon when I visit the in-laws in Cajun country and as a range toy. A Bushmaster ORC in .308 with 20 in the mag would be cheaper and make more sense, but then my FrankenFAL would get jealous. She doesn't like sharing her Portugese surplus with other rifles. ;) Best, JBR |
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Check the drop and velocity on a 230g .45 at 200yd vs a 220g .308 at the same muzzle velocity. And the fact that the barrel is the only thing required for a caliber swap with .300blk. Now this new round is a bit different, but it's still a standard ar platform other than barrel and bolt. OK. Both bullets running roughly 1000 fps muzzle velocity: The .45 230 grain drops 38 inches at 200 yards. The .308 220 grain drops 27 inches at 200 yards. What kernel of wisdom am I to take from this? By the time you spend all the $$$ on uppers and optics, and reloading supplies, and your time and transportation costs, the "standard platform" part of it is virtually meaningless. How much does a complete lower cost? In the current market, they are practically giving them away Then there is the whole reality of how many shooters do you REALLY SEE swapping lowers between the oddball uppers on any regular basis? Very few. |
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OK. Both bullets running roughly 1000 fps muzzle velocity: The .45 230 grain drops 38 inches at 200 yards. The .308 220 grain drops 27 inches at 200 yards. What kernel of wisdom am I to take from this? By the time you spend all the $$$ on uppers and optics, and reloading supplies, and your time and transportation costs, the "standard platform" part of it is virtually meaningless. How much does a complete lower cost? In the current market, they are practically giving them away Then there is the whole reality of how many shooters do you REALLY SEE swapping lowers between the oddball uppers on any regular basis? Very few. Quoted:
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Check the drop and velocity on a 230g .45 at 200yd vs a 220g .308 at the same muzzle velocity. And the fact that the barrel is the only thing required for a caliber swap with .300blk. Now this new round is a bit different, but it's still a standard ar platform other than barrel and bolt. OK. Both bullets running roughly 1000 fps muzzle velocity: The .45 230 grain drops 38 inches at 200 yards. The .308 220 grain drops 27 inches at 200 yards. What kernel of wisdom am I to take from this? By the time you spend all the $$$ on uppers and optics, and reloading supplies, and your time and transportation costs, the "standard platform" part of it is virtually meaningless. How much does a complete lower cost? In the current market, they are practically giving them away Then there is the whole reality of how many shooters do you REALLY SEE swapping lowers between the oddball uppers on any regular basis? Very few. I could always use another barrel / caliber for my LMT MRP. Just cost of barrel and price of conversion (and possibly dedicated optic). Its a fun hobby: 
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OK. Both bullets running roughly 1000 fps muzzle velocity: The .45 230 grain drops 38 inches at 200 yards. The .308 220 grain drops 27 inches at 200 yards. What kernel of wisdom am I to take from this? By the time you spend all the $$$ on uppers and optics, and reloading supplies, and your time and transportation costs, the "standard platform" part of it is virtually meaningless. How much does a complete lower cost? In the current market, they are practically giving them away Then there is the whole reality of how many shooters do you REALLY SEE swapping lowers between the oddball uppers on any regular basis? Very few. Quoted:
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Check the drop and velocity on a 230g .45 at 200yd vs a 220g .308 at the same muzzle velocity. And the fact that the barrel is the only thing required for a caliber swap with .300blk. Now this new round is a bit different, but it's still a standard ar platform other than barrel and bolt. OK. Both bullets running roughly 1000 fps muzzle velocity: The .45 230 grain drops 38 inches at 200 yards. The .308 220 grain drops 27 inches at 200 yards. What kernel of wisdom am I to take from this? By the time you spend all the $$$ on uppers and optics, and reloading supplies, and your time and transportation costs, the "standard platform" part of it is virtually meaningless. How much does a complete lower cost? In the current market, they are practically giving them away Then there is the whole reality of how many shooters do you REALLY SEE swapping lowers between the oddball uppers on any regular basis? Very few. You missed the point. Lowers that will take pistol caliber mags (other than 9mm) are not cheap. Any number of the quick-change barrel setups out there would let you swap calibers in under a minute, not so with a .45. I've already got a stack of AR mags, several standard AR lowers that are SBR'd, etc. I've got a 300blk SBR that I built mostly from leftover AR parts, cant' do that with a .45. I've also got a greasegun lower and a DI .45 upper, but it's going to take another tax stamp to SBR that one. I'll get to it eventually, and build a F1 can for it too. |
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We are here to join the party.......if there's any questions about anything let us know!! John Culpepper "U.S . Army Ret." Whiskey 3 Precision Systems Welcome! Please tell us about the brass conversion process. Also, when will barrels, bolts, and dies be available? |
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Welcome! Please tell us about the brass conversion process. Also, when will barrels, bolts, and dies be available? Quoted:
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We are here to join the party.......if there's any questions about anything let us know!! John Culpepper "U.S . Army Ret." Whiskey 3 Precision Systems Welcome! Please tell us about the brass conversion process. Also, when will barrels, bolts, and dies be available? barrel and bolts and dies should be ready to go in the next month.. brass conversation process is exactly like 300 blackout except the bass is a touch longer. Of course 308 brass is plentiful and so is .375 projectiles depending on where you are in the world. .375 is one of the last common calibers with any type of sleek profile to it for higher BC's and extended range in any type of precision manner. That was the idea for this common parent case ect... of course we are offering super light 190 grain VLD flat base profile projectiles on the light end up to 400 grain flat base projectiles for the super heavy sub sonic market. Might I add very accurately. ... and all that is needed is a barrel and bolt swap. If you don't buy the bolt from us that's cool too because any .458 socom bolt will work as well. if you have seen our flat base designs for 300 blackout guys are getting speeds they have never seen in 300 blackout before due to our projos. Here is a link just to give you an idea as to what I mean. http://www.300blktalk.com/forum/viewtopic.php?f=141&t=89679&start=10 John Culpepper " U.S. Army Ret. Whiskey 3 Precision Systems |
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Welcome, Mr. Culpepper.
I'm curious if a .450 Bushmaster upper could work with just a barrel swap, since it also has a .473 bolt face. Are there differences in barrel extension or other incompatibilities? There's a 20" .450 BM upper calling my name from Franklin Armory, and I want to build my switchbarrel Meow-Meow with that as a basis, I think. Best, JBR |
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Welcome, Mr. Culpepper. I'm curious if a .450 Bushmaster upper could work with just a barrel swap, since it also has a .473 bolt face. Are there differences in barrel extension or other incompatibilities? There's a 20" .450 BM upper calling my name from Franklin Armory, and I want to build my switchbarrel Meow-Meow with that as a basis, I think. Best, JBR I haven't dealt with the .450 bushmaster bolt but I think it has the same case rim as .308 with the .473 bolt face if I'm not mistaken just as .458 socom. If this Is the case than it will work with the barrel swap only and you would need our gas block and gas tube. Other than that you should be good. Run the same AR 15 standard magazines ect. Like I said I haven't played with the .450 bushmaster only the .458 socom. Also there are no kind of barrel extensions or other incompatibilities that I am aware of.... the barrel is of course a larger diameter but it's more like the .308 barrels of an AR10 and depending on how small the inside diameter of your quad rail is ect ....this may hinder you depending on brand. Haven't tested all of them but as an industry standard most will work and be fine. Shooting from the hip here and Hope this helps. John Culpepper " U.S. Army Ret. " Whiskey 3 Precision Systems |
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I love novelties. Evidently, you can convert an AR15 into almost any caliber. Other than the novel hobby element, I have trouble figuring what these novelties offer that you can't get better with an off-the-shelf AR in .308. I suppose somebody will mention the "sub-sonic" thing. OK. I'll give you that. Seems like an AWFUL LOT of trouble to go to only to convert a fast(er) round into a slow(er) round that offers not much more than what you would get from a suppressed .40 S&W or .45 ACP. not quite sure where you get your figures but this Round is way above a .40 cal or .45 in all aspects. Might want to refer back to ballistics of the 300 blackout and then kick those numbers up significantly in kinetic energy and pretty decent velocities depending on weight of projectiles. You can best believe the .375 Reaper will far surpass the pistol calibers and the 300 blackout. Also what made 300 blackout such an overnight success mind you was compatibility with today's existing brass parent case on the AR15 platform and guys can make the brass in their garage....reload it ect. This is no different in a beefed up package and is going to be a close quarters combat, mid range engagement sledgehammer. Hog hunters from across the county are drooling for this bad boy to be released because they are tired of lugging around the AR10 and not getting the knockdown they are looking for in a do it yourself reloading set up such as this. John Culpepper " U.S. Army Ret. " Whiskey 3 Precision Systems |
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Good observations.
Incidentally, I gave the first info to The Firearm Blog. They did an article today... The Firearm Blog .375 Reaper Article. Best, JBR |
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Just like 458 socom makes all mags legal in 10 round states. Quoted:
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Hmmm. So all of my 30 rd PMAGs are magically Colorado compliant because they are now -- 15 rd Reaper mags. Just like 458 socom makes all mags legal in 10 round states. Would they not have to be stampeed XXX cartidge? Greg |
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Would they not have to be stampeed XXX cartidge? Greg Quoted:
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Hmmm. So all of my 30 rd PMAGs are magically Colorado compliant because they are now -- 15 rd Reaper mags. Just like 458 socom makes all mags legal in 10 round states. Would they not have to be stampeed XXX cartidge? Greg To be CO compliant they would have to be stamped/molded with the large cartridge and reduced capacity. Id still like to see some real world data on this cartridge, not estimates. 458 socom can get 250gr monoflexs to well over 2000fps so I dont see this as some huge advantage nor will a 200gr at 2200 light the world on fire for the longer distances where it would shown any real advantage. Having to go above the standard silencer sizes will be a no go for many as well. I just want to see some real world velocity numbers so I can make am educated decision. |
[ARCHIVED THREAD] - New AR Chambering: .375 Reaper (Page 1 of 5)
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