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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 Allen Mag load data ready, with pics...
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<blockquote data-quote="Fiftydriver" data-source="post: 189211" data-attributes="member: 10"><p>Augustus,</p><p> </p><p>I do not think you will see any +1 BC bullets in 375 caliber. THe reason mainly is that we are wanting a lead core bullet. That will limit us to around .9 to .95 in BC which would be more then enough and about what the 265 gr AT RBBT is producing. </p><p> </p><p>Solids are great but your limited to what barrels will work well with specific bullets and also many areas require an expanding or flat point type of bullet for big game hunting. </p><p> </p><p>Plus, we do not want to deal with any extremely radical barrel twists. 1-10 is about as fast as I want to work with in this class of chambering, same as with the 338 Allen Magnum. THe reason is because as you get faster in twist rate, the effects of enviornmental conditions show up more dramatically down range. For instance, the velocity shift over 60 degree air temps will be much different in a 1-10 twist barrel then it would be in say a 1-7 twist. Add to that we are dealing with nearly 150 gr powder capacities and the effect of the envir. conditions will make even more of a dramatic difference. </p><p> </p><p>We need consistancy and with this large of a powder capacity, we really need a comfortable rifling twist to help us out. Sure it would be nice to have a 1.5 BC bullet but in all reality, the consistancy of a .9 BC bullet would be much more usible in the field throughout the year.</p><p> </p><p>If we can get some high .8 to low .9 BC bullets, I would be happy as could be.</p><p> </p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 189211, member: 10"] Augustus, I do not think you will see any +1 BC bullets in 375 caliber. THe reason mainly is that we are wanting a lead core bullet. That will limit us to around .9 to .95 in BC which would be more then enough and about what the 265 gr AT RBBT is producing. Solids are great but your limited to what barrels will work well with specific bullets and also many areas require an expanding or flat point type of bullet for big game hunting. Plus, we do not want to deal with any extremely radical barrel twists. 1-10 is about as fast as I want to work with in this class of chambering, same as with the 338 Allen Magnum. THe reason is because as you get faster in twist rate, the effects of enviornmental conditions show up more dramatically down range. For instance, the velocity shift over 60 degree air temps will be much different in a 1-10 twist barrel then it would be in say a 1-7 twist. Add to that we are dealing with nearly 150 gr powder capacities and the effect of the envir. conditions will make even more of a dramatic difference. We need consistancy and with this large of a powder capacity, we really need a comfortable rifling twist to help us out. Sure it would be nice to have a 1.5 BC bullet but in all reality, the consistancy of a .9 BC bullet would be much more usible in the field throughout the year. If we can get some high .8 to low .9 BC bullets, I would be happy as could be. Kirby Allen(50) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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375 Allen Mag load data ready, with pics...
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