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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel twist effect on bullet
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<blockquote data-quote="Fiftydriver" data-source="post: 113569" data-attributes="member: 10"><p>You will tear the A-Max bullets apart at around 3050 to 3100 fps in most cases with a 1-7 twist. At least that is the case with a Lilja 1-7 twist 3 groove.</p><p></p><p>The Ballistic Tips will take it and accuracy will be good. Expansion will be violent to say the least. I have shot the 140 gr Accubonds to a solid 3700 fps in my 7mm AMs with good accuracy.</p><p></p><p>I would recommend a 1-10 if this is the bullet you would want to use all the time, in fact a 1-12 would probably be even better.</p><p></p><p></p><p>Your really playing with the RUM using bullets of 140 gr and lighter, you will see little advantage over some of the smaller 7mm magnums. Bullets in the 160 gr range and higher really make these big cases settle down and produce good consistancy.</p><p></p><p>Just my opinion,</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 113569, member: 10"] You will tear the A-Max bullets apart at around 3050 to 3100 fps in most cases with a 1-7 twist. At least that is the case with a Lilja 1-7 twist 3 groove. The Ballistic Tips will take it and accuracy will be good. Expansion will be violent to say the least. I have shot the 140 gr Accubonds to a solid 3700 fps in my 7mm AMs with good accuracy. I would recommend a 1-10 if this is the bullet you would want to use all the time, in fact a 1-12 would probably be even better. Your really playing with the RUM using bullets of 140 gr and lighter, you will see little advantage over some of the smaller 7mm magnums. Bullets in the 160 gr range and higher really make these big cases settle down and produce good consistancy. Just my opinion, Kirby Allen(50) [/QUOTE]
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Barrel twist effect on bullet
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