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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel Wear
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<blockquote data-quote="backwoods83" data-source="post: 482201" data-attributes="member: 29890"><p>You might look beyond the obvious, to pressure is pressure as long as its not over pressure then you damage more than a barrel, possibly yourself. Fact is with a given bullet weight a smaller charge of a hotter power does the same damage as a bigger dose of a slower powder. But most people look strait to the throat as the first sign of accuracy drop off, but that really is not an issue as it can be chased in with your seating depth, the real failure lies 2-3" beyond the throat at its hottest longest burn where the riflings actually begin to start getting cracks in them only visable with a bore scope after that they can begin to start chipping. The best I have seen is smaller charges of hotter powders ( IMR 4350 in a 7mm rem mag) will live longer with proper cleaning, cool down, and lack of rapid fire. If pressure, heat, and speed killed as quick as thought a 22-250 or 220 swift with 40 grainers loaded at 4200 plus wouldn't last 100 rounds.</p></blockquote><p></p>
[QUOTE="backwoods83, post: 482201, member: 29890"] You might look beyond the obvious, to pressure is pressure as long as its not over pressure then you damage more than a barrel, possibly yourself. Fact is with a given bullet weight a smaller charge of a hotter power does the same damage as a bigger dose of a slower powder. But most people look strait to the throat as the first sign of accuracy drop off, but that really is not an issue as it can be chased in with your seating depth, the real failure lies 2-3" beyond the throat at its hottest longest burn where the riflings actually begin to start getting cracks in them only visable with a bore scope after that they can begin to start chipping. The best I have seen is smaller charges of hotter powders ( IMR 4350 in a 7mm rem mag) will live longer with proper cleaning, cool down, and lack of rapid fire. If pressure, heat, and speed killed as quick as thought a 22-250 or 220 swift with 40 grainers loaded at 4200 plus wouldn't last 100 rounds. [/QUOTE]
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