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Speed vs Barrel life
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<blockquote data-quote="BallisticsGuy" data-source="post: 1512420" data-attributes="member: 96226"><p>You forgot falling for fads.</p><p></p><p>Definitions count here. "Shot out" means different things to different people. To some it's just the throat eroding beyond a certain point. To others it's the rifling down the length of the barrel going bye-bye. To others it's when the gun starts making bigger groups than they'd like. To say a barrel is shot out or not means accepting the definition of the user, not the definition of of the observer. Comments such as the one above betoken a tendency to consider the observer's POV rather than the user's POV which would be severely flawed logic of the "no true Scotsman" variety. However, the above comment doesn't state any definition of "shot out" so it's not necessarily fallacious as stated so much as imprecisely stated to a point that it's analytically useless but it does form a useful foundation for some iterative debate.</p><p></p><p>He's still dead on right no matter what definition is used. At least 95% of replaced barrels aren't even remotely in need of it. Those of us that compete usually have more stringent requirements than most but it's still about 70:30 there (70% replaced before "needing" it). Competitors usually replace either to get the latest whiz-bang uber popular chamber or because they reached a certain round count but not usually because the pipe actually stopped turning in solid groups. If we waited for the gun to poop the bed in a match we'd be being incredibly stupid by guaranteeing ourselves a surprise match loss with a surprise terrible score that could surprise put us out of a season points race.</p><p></p><p>Lots of pro-shooters and a small proportion of non-pro competitors like to replace tubes on a round count schedule so they never cross a pre-defined line they don't want to cross in a match. So those pipes aren't almost ever fully shot out, they're just beyond 80% of their useful life span which is like replacing your tires right when the wear bars start showing. There's still a good bit of useful life left but do you really want to race on them?</p><p></p><p>When I replace a barrel, it's worn out by my definition. My definition is: I can't chase the lands anymore while still mag feeding. They'll usually still group acceptably for a good while after that point is reached but not without chasing the lands further. Jumps otherwise eventually get too big and groups go right to pot. That said, I'll order a barrel at that point and single feed until my next barrel is ready to be spun on. That could be 2-3 months later which means 400-600 rounds more will go down the old barrel.</p></blockquote><p></p>
[QUOTE="BallisticsGuy, post: 1512420, member: 96226"] You forgot falling for fads. Definitions count here. "Shot out" means different things to different people. To some it's just the throat eroding beyond a certain point. To others it's the rifling down the length of the barrel going bye-bye. To others it's when the gun starts making bigger groups than they'd like. To say a barrel is shot out or not means accepting the definition of the user, not the definition of of the observer. Comments such as the one above betoken a tendency to consider the observer's POV rather than the user's POV which would be severely flawed logic of the "no true Scotsman" variety. However, the above comment doesn't state any definition of "shot out" so it's not necessarily fallacious as stated so much as imprecisely stated to a point that it's analytically useless but it does form a useful foundation for some iterative debate. He's still dead on right no matter what definition is used. At least 95% of replaced barrels aren't even remotely in need of it. Those of us that compete usually have more stringent requirements than most but it's still about 70:30 there (70% replaced before "needing" it). Competitors usually replace either to get the latest whiz-bang uber popular chamber or because they reached a certain round count but not usually because the pipe actually stopped turning in solid groups. If we waited for the gun to poop the bed in a match we'd be being incredibly stupid by guaranteeing ourselves a surprise match loss with a surprise terrible score that could surprise put us out of a season points race. Lots of pro-shooters and a small proportion of non-pro competitors like to replace tubes on a round count schedule so they never cross a pre-defined line they don't want to cross in a match. So those pipes aren't almost ever fully shot out, they're just beyond 80% of their useful life span which is like replacing your tires right when the wear bars start showing. There's still a good bit of useful life left but do you really want to race on them? When I replace a barrel, it's worn out by my definition. My definition is: I can't chase the lands anymore while still mag feeding. They'll usually still group acceptably for a good while after that point is reached but not without chasing the lands further. Jumps otherwise eventually get too big and groups go right to pot. That said, I'll order a barrel at that point and single feed until my next barrel is ready to be spun on. That could be 2-3 months later which means 400-600 rounds more will go down the old barrel. [/QUOTE]
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