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300 Below cryo process on my 338 lapua
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<blockquote data-quote="Kevin Thomas" data-source="post: 591428" data-attributes="member: 15748"><p>Jeff,</p><p> </p><p>Sorry, but can't really say in that context. Frankly, I think the stresses are either induced or avoided during the earliest stages of manufacture. That is, how they're drilled, whether they're given subsequent heat treating while they're being profiled, and perhaps even more importantly, if they're stressed during that profiling or other machining operations. I think the ideal play here is to avoid inducing the stresses in the first place. There's a balance point here, since this means doing things slowly, which increases production times, and essentially makes the barrel cost more. In some of the more volume oriented shops, the barrel makijng process can be brutal. Barrels being contoured in (literally) one pass, taking heavy cuts that remove massive amounts of metal. I've seen some shops that yank a button through a drilled blank in as little as six (6) seconds. Things like this are going to create problems, that I'm not at all sure can be removed later, by any process. They may lessen them and show some improvement, but I think the best way to go here is to go with a barrel that hasn't been subjected to such tortures in the first place. Better off for a machinist or metallurgist to chime in here, since they'd know better than I.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 591428, member: 15748"] Jeff, Sorry, but can't really say in that context. Frankly, I think the stresses are either induced or avoided during the earliest stages of manufacture. That is, how they're drilled, whether they're given subsequent heat treating while they're being profiled, and perhaps even more importantly, if they're stressed during that profiling or other machining operations. I think the ideal play here is to avoid inducing the stresses in the first place. There's a balance point here, since this means doing things slowly, which increases production times, and essentially makes the barrel cost more. In some of the more volume oriented shops, the barrel makijng process can be brutal. Barrels being contoured in (literally) one pass, taking heavy cuts that remove massive amounts of metal. I've seen some shops that yank a button through a drilled blank in as little as six (6) seconds. Things like this are going to create problems, that I'm not at all sure can be removed later, by any process. They may lessen them and show some improvement, but I think the best way to go here is to go with a barrel that hasn't been subjected to such tortures in the first place. Better off for a machinist or metallurgist to chime in here, since they'd know better than I. [/QUOTE]
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300 Below cryo process on my 338 lapua
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