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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 cal barrel twist and projectiles?
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<blockquote data-quote="noel carlson" data-source="post: 403825" data-attributes="member: 16138"><p>Bobby,</p><p> </p><p>"Ok guys..... There will never be a stable version of the 7 cal bullet."... You are wrong. I have already proven this. What I did not realize is that I was bucking one hundred years of *fact*. The only challenge which remains is modifying for transonic stability, and I do not see this as a particularly daunting task from a design standpoint.</p><p> </p><p>"The twist rates you guys are getting into are a dangerous game and i think a much much unneeded step. "... This is just plain silly. There is nothing "dangerous" about a seventeen caliber exit-twist from a VGT barrel... except, possibly, to the economic fortunes of a shop that is not equipped to produce anything tighter than a twenty-one caliber constant twist. </p><p> </p><p>"I would love to see this stuff work and wish ya the best of luck.... Now its variable gain twist? What in the hell is this coming to? Sorry to say it all seems like a show here. But the way things are falling GS may have a viable bullet for the 8 twist barrel and should be plenty enough for now....</p><p>"... Bobby, I know something about the design principles employed in the GS "SP" projectiles. When they fall at, or below, six calibers in length, your 8" twist barrels will begin to stabilize them... but never with high accuracy unless they adopt a more sophisticated approach to aeroballistics. </p><p> </p><p>With reference to the "show" factor of VGT rifling geometry; this is not unexplored territory. It is at least twenty years old in it's most refined form, but has not yet been applied to small calibers. Once again, you are wrong. </p><p> </p><p>When working with engraving band projectiles, many opportunities open up to increase projectile BC, flatten the axial torque curve, moderate barrel whip, maintain perfect projectile/bore axis alignment, and obtain extreme velocities, that are simply not possible with 128 year old, jacketed bullet, technology.</p><p> </p><p>Best,</p><p>Noel</p></blockquote><p></p>
[QUOTE="noel carlson, post: 403825, member: 16138"] Bobby, "Ok guys..... There will never be a stable version of the 7 cal bullet."... You are wrong. I have already proven this. What I did not realize is that I was bucking one hundred years of *fact*. The only challenge which remains is modifying for transonic stability, and I do not see this as a particularly daunting task from a design standpoint. "The twist rates you guys are getting into are a dangerous game and i think a much much unneeded step. "... This is just plain silly. There is nothing "dangerous" about a seventeen caliber exit-twist from a VGT barrel... except, possibly, to the economic fortunes of a shop that is not equipped to produce anything tighter than a twenty-one caliber constant twist. "I would love to see this stuff work and wish ya the best of luck.... Now its variable gain twist? What in the hell is this coming to? Sorry to say it all seems like a show here. But the way things are falling GS may have a viable bullet for the 8 twist barrel and should be plenty enough for now.... "... Bobby, I know something about the design principles employed in the GS "SP" projectiles. When they fall at, or below, six calibers in length, your 8" twist barrels will begin to stabilize them... but never with high accuracy unless they adopt a more sophisticated approach to aeroballistics. With reference to the "show" factor of VGT rifling geometry; this is not unexplored territory. It is at least twenty years old in it's most refined form, but has not yet been applied to small calibers. Once again, you are wrong. When working with engraving band projectiles, many opportunities open up to increase projectile BC, flatten the axial torque curve, moderate barrel whip, maintain perfect projectile/bore axis alignment, and obtain extreme velocities, that are simply not possible with 128 year old, jacketed bullet, technology. Best, Noel [/QUOTE]
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375 cal barrel twist and projectiles?
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