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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 AM assembled, pics....
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<blockquote data-quote="Fiftydriver" data-source="post: 107111" data-attributes="member: 10"><p>B64,</p><p></p><p>BD408 is currently working with a 1-11.25 twist I believe in his 338 Sniper Tac. Basically a ballistic twin to my 338 AM. He is reporting fine results with that twist rate.</p><p></p><p>As far as more velocity potential, don;t think it will make alot of difference. Bore and groove diameter will probably make more difference in ultimate velocity potential then a difference of basically 1" of twist rate. I do not suspect the difference will be enough to really be measurable.</p><p></p><p>Dan Lilja tells me the velocity potential between a 1-7 and a 1-10 3 groove barrel in 7mm for instance is so small that barrel to barrel variations will impact velocity more then twist rate differences.</p><p></p><p>I am sure the larger and heavier a bullet is the larger the difference may be but its not much.</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 107111, member: 10"] B64, BD408 is currently working with a 1-11.25 twist I believe in his 338 Sniper Tac. Basically a ballistic twin to my 338 AM. He is reporting fine results with that twist rate. As far as more velocity potential, don;t think it will make alot of difference. Bore and groove diameter will probably make more difference in ultimate velocity potential then a difference of basically 1" of twist rate. I do not suspect the difference will be enough to really be measurable. Dan Lilja tells me the velocity potential between a 1-7 and a 1-10 3 groove barrel in 7mm for instance is so small that barrel to barrel variations will impact velocity more then twist rate differences. I am sure the larger and heavier a bullet is the larger the difference may be but its not much. Kirby Allen(50) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 AM assembled, pics....
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