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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat erosion and double-based powders.
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<blockquote data-quote="Haagen Dazs" data-source="post: 634677" data-attributes="member: 42602"><p>This is a great discussion. I've got a question if someone can shed some light on the whole barrel life issue:</p><p></p><p>A 7 WSM shoots a 180gn bullet at about 3000 fps and a 338 norma mag shoots a 300 gn bullet around 2650 fps. They both use about 1.4 gn / sq mm which means they should have about 1500 rounds of barrel life for decent precision (~1/2 MoA).</p><p></p><p>Shouldn't the 338 have a better barrel life because its shooting a larger bullet slower? Or does barrel life have nothing to do with the interference fit between the rifling and the bearing surface? Also, what is the 'coolest' burning powder that is recognized as a powder that's easy on barrels? (if there is one)...</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="Haagen Dazs, post: 634677, member: 42602"] This is a great discussion. I've got a question if someone can shed some light on the whole barrel life issue: A 7 WSM shoots a 180gn bullet at about 3000 fps and a 338 norma mag shoots a 300 gn bullet around 2650 fps. They both use about 1.4 gn / sq mm which means they should have about 1500 rounds of barrel life for decent precision (~1/2 MoA). Shouldn't the 338 have a better barrel life because its shooting a larger bullet slower? Or does barrel life have nothing to do with the interference fit between the rifling and the bearing surface? Also, what is the 'coolest' burning powder that is recognized as a powder that's easy on barrels? (if there is one)... Thanks [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat erosion and double-based powders.
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