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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: 632817" data-attributes="member: 5302"><p><strong>Re: 338 Norma Mag? How much is too much?</strong></p><p></p><p>How many rounds of barrel life do you think the .338 NM will deliver? Especially if you start out with a 5/8 MOA rifle at 1000 yards and want to sustain it over the barrel life. Note the .338 caliber has a bore capacity of about 58 grains of powder. 90 grain powder charges are way overbore and wear out barrels pretty fast.</p><p></p><p>Long range target rifles with that much overbore capacity powder charges last about 1200 rounds then accuracy drops off. 'Course if you start out with a 2 MOA rifle, then it will last a lot longer at that performance level.</p><p></p><p>Don't forget, the recoil that's harmful to accurate shooting takes place while the bullet's are going down the barrel. Muzzle brakes don't reduce that. After the bullet's cleared the barrel, recoil's a non-issue except for ones egos.</p></blockquote><p></p>
[QUOTE="Bart B, post: 632817, member: 5302"] [b]Re: 338 Norma Mag? How much is too much?[/b] How many rounds of barrel life do you think the .338 NM will deliver? Especially if you start out with a 5/8 MOA rifle at 1000 yards and want to sustain it over the barrel life. Note the .338 caliber has a bore capacity of about 58 grains of powder. 90 grain powder charges are way overbore and wear out barrels pretty fast. Long range target rifles with that much overbore capacity powder charges last about 1200 rounds then accuracy drops off. 'Course if you start out with a 2 MOA rifle, then it will last a lot longer at that performance level. Don't forget, the recoil that's harmful to accurate shooting takes place while the bullet's are going down the barrel. Muzzle brakes don't reduce that. After the bullet's cleared the barrel, recoil's a non-issue except for ones egos. [/QUOTE]
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Independent Study: LRH calibres - 7mm WSM vs 300 RUM vs 338 LM
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