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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
87grn V-Max and Twist Rate Question
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<blockquote data-quote="Gary Morgan" data-source="post: 165877" data-attributes="member: 8580"><p><strong>105 A-Max and 10-twist barrel</strong></p><p></p><p>Wildcat, my velocities ran from 3100 to 3425. The bullet didn't group very well past 3,200 FPS. It took 55 grains of H4831SC to get to 3,425, and I had a slightly stiff bolt lift at this point. </p><p></p><p>I tried some 87 grain V-Maxes that I had loaded up for another barrel that I have. 56grains of 4831 chronos 3,575 in my 26-inch barrel, and the same load in the new 30-inch Hart shows 3675. I may be able to get to 3750 because I wasn't showing any pressure signs at 3675. This 87 gr. V-Max open up on PDs at 1,000 based on my experience.</p></blockquote><p></p>
[QUOTE="Gary Morgan, post: 165877, member: 8580"] [b]105 A-Max and 10-twist barrel[/b] Wildcat, my velocities ran from 3100 to 3425. The bullet didn't group very well past 3,200 FPS. It took 55 grains of H4831SC to get to 3,425, and I had a slightly stiff bolt lift at this point. I tried some 87 grain V-Maxes that I had loaded up for another barrel that I have. 56grains of 4831 chronos 3,575 in my 26-inch barrel, and the same load in the new 30-inch Hart shows 3675. I may be able to get to 3750 because I wasn't showing any pressure signs at 3675. This 87 gr. V-Max open up on PDs at 1,000 based on my experience. [/QUOTE]
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87grn V-Max and Twist Rate Question
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