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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
High Velocity Throat Erosion
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<blockquote data-quote="Calvin45" data-source="post: 2584833" data-attributes="member: 109862"><p>On the flip side, it could be that heavy for caliber bullets are better because they're </p><p></p><p>a)more efficient as far as foot pounds per grain of powder burned - this is indisputable. Using the same powder you need a higher charge weight to reach the same level of muzzle energy with the lighter bullet. All load data plainly shows this to be true. And I think we're all agreeing the bullet itself isn't what erodes the barrel - otherwise the muzzle end would be more eroded but it isn't. </p><p></p><p>B) this is more speculative, but it seems to me that the heavier bullet, more reluctant to get going and with more bearing surface to resist engraving, probably results in more of the most intense part of the burning transpiring inside the cartridge case than in the throat and barrel. Probably not by much but still a non-zero effect for sure, it has to be! Would explain a lot. By the time thay big pill has made it X amount down the pipe, the light weight has gone notably farther AND allowed more still-burning powder into the throat (and this out probably a higher charge weight as we discussed).</p></blockquote><p></p>
[QUOTE="Calvin45, post: 2584833, member: 109862"] On the flip side, it could be that heavy for caliber bullets are better because they’re a)more efficient as far as foot pounds per grain of powder burned - this is indisputable. Using the same powder you need a higher charge weight to reach the same level of muzzle energy with the lighter bullet. All load data plainly shows this to be true. And I think we’re all agreeing the bullet itself isn’t what erodes the barrel - otherwise the muzzle end would be more eroded but it isn’t. B) this is more speculative, but it seems to me that the heavier bullet, more reluctant to get going and with more bearing surface to resist engraving, probably results in more of the most intense part of the burning transpiring inside the cartridge case than in the throat and barrel. Probably not by much but still a non-zero effect for sure, it has to be! Would explain a lot. By the time thay big pill has made it X amount down the pipe, the light weight has gone notably farther AND allowed more still-burning powder into the throat (and this out probably a higher charge weight as we discussed). [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
High Velocity Throat Erosion
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