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Posted: 11/7/2019 2:10:35 PM EDT
[#1]
Quote HistoryQuoted:
Quite significantly, they’re not rifled. |
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Posted: 11/7/2019 2:11:32 PM EDT
[#2]
Quote HistoryQuoted:
Just because YOU personally don't know how to rifle them in your garage or basement doesn't mean engineers can't. Quote HistoryQuoted:
Quoted:
Quite significantly, they’re not rifled. 
@AeroE |
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Posted: 11/7/2019 2:13:47 PM EDT
[#3]
Quote HistoryQuoted:
Quote: "This is a must have. I'm an aerospace technologist and inconel is the same material used in the x-wing to break the sound barrier. [1] You want this. If these came standard in the early stages of the Vietnam war there wouldn't have been bad reputations. [2] Have you seen a stainless steel gas tube melt? Well you won't see it ever again with one of these gas tubes 100% I put my life on it. V SEVEN is breaking barriers with all their technologies, very smart people at work here!" I didn't realize the X-wing was in service. 
2. Really, it would have solved the problem with Ball propellant fouling and high cyclic rate? Fascinating! 3. [sarcasm]Yup, you sound like an "aerospace technologist" . . .[/sarcasm] The military has 56 years of testing, with literally millions of rounds sent down range in the process, published exactly one report where gas tube failure occurred (this one). And, that happened after the test weapon fired 810 rounds in 4 minutes, 11 seconds, averaging 3.22 rounds per second. Yup, that is a normal firing schedule that justifies the 10X the cost. Fools and money, didn't someone have a saying about that? |
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Posted: 11/7/2019 2:15:49 PM EDT
[#4]
Quote HistoryQuoted: There are 3 or 4 SME's here who disagree with me and their reasons were "it's not cost effective." But the engineers over at V Seven who make AR 15's disagree with you and the SME's here. Since when has the entire scientific community agreed with 3 SME's here? Do the 3 SME's here represent all engineers globally? Do the SME's here support the DI platform or the short stroke piston platform? Do the SMEs here agree with the U.S. Marines switching over to the more expensive HK M27 IAR or want to keep using the Colt DI ? The owner, engineers and tribologists at Cherry Balmz disagree with the 3 SME's here on proper lubrication for the AR 15 who thought using CLP and oil in a open operating system was the proper way to lubricate a AR 15 DI system... https://www.ar15.com/forums/general/CherryBalmz-vs-SlideGlide/5-2105715/ I think this is a really cool discussion (especially if we dealt more in the metrics of benefits/improvements a specific material may bring to the table) but your continuous refusal to listen to some smart people who have experience in the business is getting old. This is a business 101 lesson. |
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Posted: 11/7/2019 2:16:52 PM EDT
[#5]
Quote HistoryQuoted: There are 3 or 4 SME's here who disagree with me and their reasons were "it's not cost effective." But the engineers over at V Seven who make AR 15's disagree with you and the SME's here. Since when has the entire scientific community agreed with 3 SME's here? Do the 3 SME's here represent all engineers globally? Do the SME's here support the DI platform or the short stroke piston platform? Do the SMEs here agree with the U.S. Marines switching over to the more expensive HK M27 IAR or want to keep using the Colt DI ? The owner, engineers and tribologists at Cherry Balmz disagree with the 3 SME's here on proper lubrication for the AR 15 who thought using CLP and oil in a open operating system was the proper way to lubricate a AR 15 DI system... https://www.ar15.com/forums/general/CherryBalmz-vs-SlideGlide/5-2105715/ I notice a trend here. When a company that has a product that was designed by engineers releases it to the public you have 3 SME's here who bad mouth it. SME's here have bad mouthed short stroke piston AR's (HK's, POF's) SME's here bad mouth advanced lubricants engineered by people smarter then them. Which SME's here designed, produced and built their own AR's with their own factory with their own materials? There's a reason why Jim Fuller no longer posts on the AK forums because the garage builder "engineers" thought Rifle Dynamics were too expensive for their $600 AK's. Again, the biggest fear of people here isn't that it's not possible, it's just their fear is the industry might move away from their precious 1960's Colt DI system. |
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Posted: 11/7/2019 2:19:33 PM EDT
[#6]
Quote HistoryQuoted: It isn't cost effective. That is an absolute, undisputed FACT. Some of these exotic materials may offer a quantifiable advantage over current AR materials. Nobody here disputes that. The hang up is that quantifiable advantage is not enough to justify the investment to make the change. V7 makes good stuff but is a small boutique parts manufacturer whose customers are an individual can spend their money as they choose on exotic parts regardless of the true value. A procurement from the government with tons of bean counters cannot spend in the same fashion. The purchase has to be justified. Otherwise you'd see Honda Accords constructed in carbon fiber. I think this is a really cool discussion (especially if we dealt more in the metrics of benefits/improvements a specific material may bring to the table) but your continuous refusal to listen to some smart people who have experience in the business is getting old. This is a business 101 lesson. |
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Posted: 11/7/2019 2:19:39 PM EDT
[#7]
Quote HistoryQuoted:
As if Inconel hasn't been used in mass production for consumers? (long list of automotive products C/P from Wikipedia) Quote HistoryQuoted:
As if Inconel hasn't been used in mass production for consumers? (long list of automotive products C/P from Wikipedia) Quoted:Please explain how the requirements of these system equates to the requirements of a rifle barrel? Quoted: Mass produced for customers. It's been subjected to corrosive environments. Workable. High heat applicable. HKPOF, what you've just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational answer to the question. Everyone reading this thread is now dumber for having read it. You have no clue to what the requirements for a rifle barrel are, and may God have mercy on your soul. |
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Posted: 11/7/2019 2:21:54 PM EDT
[#8]
Quote HistoryQuoted:
I'm sorry but that response is just asking for this: HKPOF, what you've just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational answer to the question. Everyone reading this thread is now dumber for having read it. You have no clue to what the requirements for a rifle barrel are, and may God have mercy on your soul. Quote HistoryQuoted:
Quoted: Mass produced for customers. It's been subjected to corrosive environments. Workable. High heat applicable. HKPOF, what you've just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational answer to the question. Everyone reading this thread is now dumber for having read it. You have no clue to what the requirements for a rifle barrel are, and may God have mercy on your soul. 
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Posted: 11/7/2019 2:27:00 PM EDT
[#9]
I appreciate all of the knowledge and input in this thread. If somebody is committed to doing the machining, I'll do my best to get material to them. PM me what you need.
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Posted: 11/7/2019 2:28:23 PM EDT
[#10]
Quote HistoryQuoted:
1) X-wing? Really? I didn't realize the X-wing was in service. https://static.turbosquid.com/Preview/2015/10/14__02_29_23/xwingtopleft_01_open_01.jpgb5dc9c7c-25bc-44f8-88ba-50e41873111aZoom.jpg 2. Really, it would have solve the problem with Ball propellant fouling and high cyclic rate? Fascinating! 3. [sarcasm]Yup, you sound like an "aerospace technologist" . . .[/sarcasm] The military has 56 years of testing, with literally millions of rounds sent down range in the process, published exactly one report where gas tube failure occurred (this one). And, that happened after the test weapon fired 810 rounds in 4 minutes, 11 seconds, averaging 3.22 rounds per second. Yup, that is a normal firing schedule that justifies the 10X the cost. And where's your engineering degree? Get on webcam or skype and show us. |
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Posted: 11/7/2019 2:30:58 PM EDT
[#11]
Do any of you agree or disagree with the U.S. Marines decision to switch to the HK M27 IAR?
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Posted: 11/7/2019 2:32:46 PM EDT
[#12]
Quote HistoryQuoted:
Has anyone on this thread ever built their own rifles from their own factory with their own materials? Who are the engineers here? Get on webcam or skype and show us your degrees Msc in engineering, minors in mathematics etc. We got a bunch of garage builders here with low IQ's. lol
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Posted: 11/7/2019 2:33:20 PM EDT
[#13]
If I can remember, there was a lot of division inside the Congress and DOD to buy the more expensive HK M27 rifles for the Marines.
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Posted: 11/7/2019 2:36:52 PM EDT
[#14]
Quote HistoryQuoted: When you can get the courage to get on skype or webcam and show the world all those degrees in engineering and mathematics on your wall and your resume and all the things you discovered and invented. Bitter drunk garage builders with low IQ's. No wonder Jim Fuller laughed at you guys and left. Look at the questions the ""engineers" here asked the owner of Cherry Balmz lol https://www.ar15.com/forums/general/CherryBalmz-vs-SlideGlide/5-2105715/ The "engineers" here had no idea of tribology and proper lubrication. |
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Posted: 11/7/2019 2:39:40 PM EDT
[#15]
@BURN
@Fat_McNasty @badkarmaii @40xb @RictusGrin Hey come look at this.
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Posted: 11/7/2019 2:43:56 PM EDT
[#16]
At long last......the move.
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Posted: 11/7/2019 2:45:04 PM EDT
[#17]
Quote HistoryQuoted:
When you can get the courage to get on skype or webcam and show the world all those degrees in engineering and mathematics on your wall and your resume and all the things you discovered and invented. Bitter drunk garage builders with low IQ's. No wonder Jim Fuller laughed at you guys and left. Look at the questions the ""engineers" here asked the owner of Cherry Balmz lol https://www.ar15.com/forums/general/CherryBalmz-vs-SlideGlide/5-2105715/ The "engineers" here had no idea of tribology and proper lubrication. Quote HistoryQuoted:
Quoted:
Oh hold on. We just need the right engineer to figure it out. Engineers know everything. You’re not an engineer so you’re just dumb. Bitter drunk garage builders with low IQ's. No wonder Jim Fuller laughed at you guys and left. Look at the questions the ""engineers" here asked the owner of Cherry Balmz lol https://www.ar15.com/forums/general/CherryBalmz-vs-SlideGlide/5-2105715/ The "engineers" here had no idea of tribology and proper lubrication. 
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Posted: 11/7/2019 2:46:42 PM EDT
[#18]
Quote HistoryQuoted: If you "have all the answers" already why come ask questions to low IQ builders? In any case I'm done here. I gave you the benefit of the doubt at first but have lost patience. Real engineers and owners of companies have come to this website only to have faceless people behind computers attack them. Owners and engineers who work for Cherry Balmz lubricants came here to discuss their products were met with immature nonsense. Jim Fuller at Rifle Dynamics was attacked by faceless people on these forums. Jim Fuiler has a company that releases AK 47's. Do any "SME's" here do that? Let's see their products and compare. The supposed brilliant "SME's" here are happy with their 1960's Colt DI guns and for some reason. Usually engineers and people in physics talk and think like Neil Degrasse Tyson and aren't scared of change. |
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Posted: 11/7/2019 2:47:28 PM EDT
[#19]
How could I forget?
@Ridgerunner9876 @Kuraki @TinSpinner |
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Posted: 11/7/2019 2:47:51 PM EDT
[#20]
Quote HistoryQuoted:
Inconel is exceptional for use in high pressure, high temp (absolute temp and temp delta) applications...but it's pricey and a massive pain to work with. Or all 8 million M16s? Better save it for autocannons.
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Posted: 11/7/2019 2:47:52 PM EDT
[#21]
The U.S. military I guess thought that there was more upside and a higher ceiling of development with the short stroke piston than the DI.
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Posted: 11/7/2019 2:48:56 PM EDT
[#22]
Quote HistoryQuoted:
Calls for backup because he can't debate one on one. "Hey guys come here! Quick!!! Waaaa waaaa" Quote HistoryQuoted:
Quoted:
@BURN @Fat_McNasty @badkarmaii @40xb @RictusGrin Hey come look at this. 
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Posted: 11/7/2019 2:50:18 PM EDT
[#23]
Quote HistoryQuoted:
Has anyone on this thread ever built their own rifles from their own factory with their own materials? Who are the engineers here? Get on webcam or skype and show us your degrees Msc in engineering, minors in mathematics etc. We got a bunch of garage builders here with low IQ's. lol 
What's in your wallet? While I have a Bachelor's of Science in Aerospace Engineering, I will be the first to say that you don't need an expensive piece of paper to "engineer". But what you do need is an understanding of how to go about "engineering". Someone back at the beginning on this thread outlined what that process is, but you have ignored it. Others have tried to guide you to do some basic research on what the actual requirements are for barrels and other gun related things. Again you resisted. Now most of those that were trying to be helpful have formed a slightly different opinion and are posting accordingly. |
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Posted: 11/7/2019 2:50:55 PM EDT
[#24]
Quote HistoryQuoted: I don't have all the answers and never said I did have all the answers. I never once claimed to be an engineer. I'm not the one claimed to be a "SME" but about 3 people did here. But I have yet to see any evidence anyone who posted here actually has a degree in engineering or chemistry or physics or mathematics. Real engineers and owners of companies have come to this website only to have faceless people behind computers attack them. Owners and engineers who work for Cherry Balmz lubricants came here to discuss their products were met with immature nonsense. Jim Fuller at Rifle Dynamics was attacked by faceless people on these forums. Jim Fuiler has a company that releases AK 47's. Do any "SME's" here do that? Let's see their products and compare. The supposed brilliant "SME's" here are happy with their 1960's Colt DI guns and for some reason. Usually engineers and people in physics talk and think like Neil Degrasse Tyson and aren't scared of change. |
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Posted: 11/7/2019 2:51:17 PM EDT
[#25]
Quote HistoryQuoted:
Zia has built me a high end precision bolt action. I am on his list for at least another 3. Did Zoe or Zia manufacture those parts in house from his own manufacturing company or did he buy the parts from vendors and assemble them in his garage? But, here's the thing about frankenstein kit builds, those guns are the first to stop working at carbine classes according to Pat Rodgers. |
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Posted: 11/7/2019 2:54:05 PM EDT
[#26]
Quote HistoryQuoted:
I don't have all the answers and never said I did have all the answers. I never once claimed to be an engineer. I'm not the one claimed to be a "SME" but about 3 people did here. But I have yet to see any evidence anyone who posted here actually has a degree in engineering or chemistry or physics or mathematics. Real engineers and owners of companies have come to this website only to have faceless people behind computers attack them. Owners and engineers who work for Cherry Balmz lubricants came here to discuss their products were met with immature nonsense. Jim Fuller at Rifle Dynamics was attacked by faceless people on these forums. Jim Fuiler has a company that releases AK 47's. Do any "SME's" here do that? Let's see their products and compare. The supposed brilliant "SME's" here are happy with their 1960's Colt DI guns and for some reason. Usually engineers and people in physics talk and think like Neil Degrasse Tyson and aren't scared of change. Signed, BS Industrial Engineering-Clemson University |
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Posted: 11/7/2019 2:54:22 PM EDT
[#27]
Quote HistoryQuoted:
Define "factory". https://i.imgur.com/sPFo4aA.jpg?1 https://i.imgur.com/k9f7at9.jpg?2 https://i.imgur.com/fhmPU9c.jpg?1 What's in your wallet? While I have a Bachelor's of Science in Aerospace Engineering, I will be the first to say that you don't need an expensive piece of paper to "engineer". But what you do need is an understanding of how to go about "engineering". Someone back at the beginning on this thread outlined what that process is, but you have ignored it. Others have tried to guide you to do some basic research on what the actual requirements are for barrels and other gun related things. Again you resisted. Now most of those that were trying to be helpful have formed a slightly different opinion and are posting accordingly. Or, ohhhhh please send that rifle to Battlefield Las Vegas and let them put that on the line for customers to use, your guns would be destroyed in less than a week. There's a reason why the U.S. military didn't ask you to build them rifles.
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Posted: 11/7/2019 2:54:47 PM EDT
[#28]
Heat resistance is not the only thing barrels need.
As research on molten salt reactors increases, we may well see new alloys that surpass existing ones in both heat resistance and corrosion resistance. |
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Posted: 11/7/2019 2:55:22 PM EDT
[#29]
Quote HistoryQuoted:
I love this place so much.
@AeroE |
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Posted: 11/7/2019 2:56:49 PM EDT
[#30]
Quote HistoryQuoted: You just happened to disagree with people (many engineers) who work in the very field you are asking about. Let's see, do I go with the lone, renegade opinion that has no engineering background or maybe the shared opinion by a few SME's (and engineers) with possibly decades of experience? That's a tough one to choose. Signed, BS Industrial Engineering-Clemson University I also agree with the engineers at HK, LMT, KAC, POF who are using non-disclosed alloys in their BCG's. Not just random garage builders here who LOVE LMT Enhanced BCG's for their kit builds. So what are the exact materials used in HK, LMT, KAC, POF bcg's? Basic steel and aluminum?
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Posted: 11/7/2019 3:00:36 PM EDT
[#31]
Quote HistoryQuoted: I never said I was an aerospace engineer or said anything about any X-Wing, I posted from a website from someone who posted a review who said that. Go back to page 3 where it is. Nice try. And where's your engineering degree? Get on webcam or skype and show us. unless.... |
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Posted: 11/7/2019 3:02:37 PM EDT
[#32]
Quote HistoryQuoted:
@BURN @Fat_McNasty @badkarmaii @40xb @RictusGrin Hey come look at this. So, how are you going to rifle the tube? And ream the chamber? Ya a hastaloy/inconell barrel would be tits in an overbored cartridge. But how ya going to make it? Once all said and done your going to have a $2K+ barrel, that's before fitting and final install. Out of the realm of most shooters. I've machined both materials in Question and both suck balls. |
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Posted: 11/7/2019 3:02:45 PM EDT
[#33]
A CHF chrome lined barrel lasts 80,000 rounds and costs $300.
Unless these wonder metals weigh less than aluminum, what's the point? |
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Posted: 11/7/2019 3:03:10 PM EDT
[#34]
Quote HistoryQuoted:
If you bothered to read my post you would have seen my remarks were aimed at the "internet SME" that claimed Inconel gas tubes were a "must-have", not you..... unless.... |
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Posted: 11/7/2019 3:03:23 PM EDT
[#35]
Quote HistoryQuoted: Now put that through one of Pat Rodgers and Reid Hendrichs courses and see if it can go hard core 5k rounds in 2 days without malfunctioning. Or, ohhhhh please send that rifle to Battlefield Las Vegas and let them put that on the line for customers to use, your guns would be destroyed in less than a week. There's a reason why the U.S. military didn't ask you to build them rifles. 
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Posted: 11/7/2019 3:08:06 PM EDT
[#36]
Quote HistoryQuoted:
I’ll make you famous. That's why I like you. 
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Posted: 11/7/2019 3:08:31 PM EDT
[#37]
Quote HistoryQuoted:Usually engineers and people in physics talk and think like Neil Degrasse Tyson and aren't scared of change. |
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Posted: 11/7/2019 3:09:25 PM EDT
[#38]
Quote HistoryQuoted:
LOL. You are a professional shit disturber. That's why I like you. |
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Posted: 11/7/2019 3:14:27 PM EDT
[#39]
Quote HistoryQuoted:
Uh, ya.. So, how are you going to rifle the tube? And ream the chamber? Ya a hastaloy/inconell barrel would be tits in an overbored cartridge. But how ya going to make it? Once all said and done your going to have a $2K+ barrel, that's before fitting and final install. Out of the realm of most shooters. I've machined both materials in Question and both suck balls. Quote HistoryQuoted:
Quoted:
@BURN @Fat_McNasty @badkarmaii @40xb @RictusGrin Hey come look at this. So, how are you going to rifle the tube? And ream the chamber? Ya a hastaloy/inconell barrel would be tits in an overbored cartridge. But how ya going to make it? Once all said and done your going to have a $2K+ barrel, that's before fitting and final install. Out of the realm of most shooters. I've machined both materials in Question and both suck balls. Not exactly whizz bang for production but it works. I had a Wilson ECM poly rifled barrel blank. Benefit was it was dead as fried chicken. ECM and then cryo treated. I wish I would have kept it and finished that project. Too many irons in the fire. 
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Posted: 11/7/2019 3:19:01 PM EDT
[#40]
Quote HistoryQuoted: When you can get the courage to get on skype or webcam and show the world all those degrees in engineering and mathematics on your wall and your resume and all the things you discovered and invented. Bitter drunk garage builders with low IQ's. No wonder Jim Fuller laughed at you guys and left. Look at the questions the ""engineers" here asked the owner of Cherry Balmz lol https://www.ar15.com/forums/general/CherryBalmz-vs-SlideGlide/5-2105715/ The "engineers" here had no idea of tribology and proper lubrication. 
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Posted: 11/7/2019 3:19:49 PM EDT
[#41]
Quote HistoryQuoted:
ECM Not exactly whizz bang for production but it works. I had a Wilson ECM poly rifled barrel blank. Benefit was it was dead as fried chicken. ECM and then cryo treated. I wish I would have kept it and finished that project. Too many irons in the fire. |
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Posted: 11/7/2019 3:22:07 PM EDT
[#42]
Quote HistoryQuoted:
What have you produced? I created a thread and soon the garage kit builders jumped in who claimed to be engineers with pessimistic defeatist attitudes about the possibility of using expensive materials. There's a reason why the supposed "engineers" here aren't being hired by Elon Musk and Tesla or any company that demands aggressive creating thinking and pushing the limits. Remember, some people want forever AK 47's to be $200-$600 stamped and AR's to be $700-$900 Colt DI's and never change and when those guns which are cheaper have malfunctions they trash them and attack the company. |
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Posted: 11/7/2019 3:22:59 PM EDT
[#43]
I like this guy, he’s the best name dropper I’ve seen in a while. Ignorant as fuck, but amusing
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HKPOF, how have you enjoyed the pat rodgers courses you’ve been to? |
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Posted: 11/7/2019 3:24:38 PM EDT
[#44]
Looks like I missed all the technical fun.
FWIW, practicality has to be a consideration when looking at materials. "Ultimate" is rarely that high on the list. "Good enough" "Cost effective" "Price point" and shit like that are. Also, "high temperature" is not the entire story when picking an abrasion resistant material for high temp applications. What works inside turbine engines is different than what works on a nozzle of an injection mold or a machinegun barrel. We may be able to find a super material to make car tires from that would last 500k miles. What of it, if they cost three times what the car does and exceed the life of the car by 2.5 times? Nothing wrong with dreaming. But real life will always have final say on what's practical. |
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Posted: 11/7/2019 3:28:23 PM EDT
[#45]
Pat Rogers on people who bring their kit build guns to his courses...
"Parts guns Parts ain't parts. If you get your stuff from gun shows and garage sales, don't expect quality I had a guy in a recent class bragging on T1 that he built his carbine for $400 and "it is just as good as..." That feternoon it wouldn't ectract. The extractor was worn snooth and then re park'd; the extractot spring was flat (no joke) and the insert was just crumbs. We replaced it all. On T3 his bolt broke in half." https://www.ar15.com/forums/ar-15/What_Parts_Break_in_a_Carbine_Course_____Thread_summaries_are_on_pages_48_49/118-360169/? |
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Posted: 11/7/2019 3:28:38 PM EDT
[#46]
Quote HistoryQuoted:
Looks like I missed all the technical fun. FWIW, practicality has to be a consideration when looking at materials. "Ultimate" is rarely that high on the list. "Good enough" "Cost effective" "Price point" and shit like that are. Also, "high temperature" is not the entire story when picking an abrasion resistant material for high temp applications. What works inside turbine engines is different than what works on a nozzle of an injection mold or a machinegun barrel. We may be able to find a super material to make car tires from that would last 500k miles. What of it, if they cost three times what the car does and exceed the life of the car by 2.5 times? Nothing wrong with dreaming. But real life will always have final say on what's practical. the squeaker shooters would be in heaven! And Fat would lose out on all that sweet, sweet cash for putting new tubes on their actions every year.
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Posted: 11/7/2019 3:31:57 PM EDT
[#47]
Quote HistoryQuoted: Now we're talking. But, are you referring to fully automatic for 100,000 rounds? Now that's pushing the boundaries. |
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Posted: 11/7/2019 3:32:21 PM EDT
[#48]
Quote HistoryQuoted: that's what I was thinking as well, on how to do it. What was the surface finish like on the riffling/chamber? I know you could go carbide on the reamer, and eat them quick. Carbide reamers are not cheap, even with me having PTG in my AO.  Contrary to our budding scientistengineergunsmith's opinion, hasteloy would not be better than something like stellite, CMP-REX 76 or CPM10V, or some of the other super abrasion resistant alloys. But, if a nerd really wanted a barrel made of one, ECMing the chamber would be no harder (easier, actually) than doing the rifling. Alignment could require some precision fixturing that you wouldn't need in a conventional process. Plus, those machines are NASTY. 
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Posted: 11/7/2019 3:32:51 PM EDT
[#49]
Stellite has been the U.S.'s preferred liner material for small arms since WWII. It's a cobalt-chrome alloy that it very hard and erosion-resistant. I believe it is investment-cast (including the rifling), and the outside is ground to provide a repeatable interference fit with the steel portion of the barrel. It has very nearly the same modulus of elasticity and thermal expansion coefficient as a low-alloy steel, such as 4150, making it highly compatible.
Stellite is relatively ineffective for use in bigger guns - I have some documents that state molybdenum and tantalum are highly effective in mitigating erosion. Stellite is shrunk-fit in barrels, whereas I believe tantalum is explosively formed to the steel gun tube. The problem with an AR-15 barrel is that you don't really have a lot of wall thickness to work with, especially at the extreme rear, where it is threaded. |
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Posted: 11/7/2019 3:33:14 PM EDT
[#50]
Quote HistoryQuoted:
So what? People put together part kits all the time. Did Zoe or Zia manufacture those parts in house from his own manufacturing company or did he buy the parts from vendors and assemble them in his garage? But, here's the thing about frankenstein kit builds, those guns are the first to stop working at carbine classes according to Pat Rodgers. Quote HistoryQuoted:
Quoted:
Zia has built me a high end precision bolt action. I am on his list for at least another 3. Did Zoe or Zia manufacture those parts in house from his own manufacturing company or did he buy the parts from vendors and assemble them in his garage? But, here's the thing about frankenstein kit builds, those guns are the first to stop working at carbine classes according to Pat Rodgers.
The barrels he's done for me won't shoot better than half-MOA unless I'm really paying attention to what I'm doing, both behind the gun and on the loading bench. In his defense, he only barreled one of those rifles, so I could have caused the lack of performance in the others while being Dr. Frankenstein in my garage. My last trip to the range had a 3-round zero confirmation with an AR-10 in 6.5C, including cold bore shot, all within 0.25" of POA, but his barrel likely had nothing to do with that. In all seriousness, I'm not interested in acquiring barrels by anyone but Zia. Just how it is. |
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