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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Independent Study: LRH calibres - 7mm WSM vs 300 RUM vs 338 LM
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<blockquote data-quote="Bart B" data-source="post: 632957" data-attributes="member: 5302"><p>Haagen, I go with powder; ammunition uses powder, not water.</p><p></p><p>Calculate the area in square millimeters of any bore and that's the charge weight in grains when producing a max safe load that's at bore capacity.....by my formula. At top accuracy levels, it gets about 3000 rounds of barrel life</p><p></p><p>Double that amount of powder for the same caliber and barrel life drops by 75% for the same accuracy level.</p><p></p><p>So, a .338 caliber has a bore capacity of about 59 grains. A .338 Win. Mag. (I don't think there's a .338 Norma Mag) burns about 64 grains of powder shooting 300 grain bullets. It'll have about 2300 to 2500 rounds of 3/4 MOA accuracy at 1000 yards......providing the loads and the rifle plus its sights and the shooter's ability can do that.</p></blockquote><p></p>
[QUOTE="Bart B, post: 632957, member: 5302"] Haagen, I go with powder; ammunition uses powder, not water. Calculate the area in square millimeters of any bore and that's the charge weight in grains when producing a max safe load that's at bore capacity.....by my formula. At top accuracy levels, it gets about 3000 rounds of barrel life Double that amount of powder for the same caliber and barrel life drops by 75% for the same accuracy level. So, a .338 caliber has a bore capacity of about 59 grains. A .338 Win. Mag. (I don't think there's a .338 Norma Mag) burns about 64 grains of powder shooting 300 grain bullets. It'll have about 2300 to 2500 rounds of 3/4 MOA accuracy at 1000 yards......providing the loads and the rifle plus its sights and the shooter's ability can do that. [/QUOTE]
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Independent Study: LRH calibres - 7mm WSM vs 300 RUM vs 338 LM
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