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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 - 2900 ft/s most efficiently?
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<blockquote data-quote="osok-1k" data-source="post: 1504813" data-attributes="member: 106259"><p>I believe that volumetric efficiency is very important in any cartridge, to that end the 6.5-284 or 260 AI would be at the top of my list in terms efficiency for the bullet weight / velocity you desire, which I agree with from a practical side. I didn't notice your intended purpose for the rifle which is also a huge factor. I just built a 6.5 Creedmoor with a Curtis Axiom and Bartlein 9-8 gain twist at 25 inches, Trigger Tech Diamond trigger and cut the chamber with a PTG match reamer for slightly tighter chamber tolerances. I'm loading Petersen small primer brass, settling 42.2gr of H4350, CCI 450 primer and Hornady 143ELDX .020 off the lands. I got an average of 2775 with my Magnetospeed. Sub 1/2 moa groups in strings of 5 (with Magnetospeed attached). I also had a few test rounds at 42.6 which bumped it to 2840 but not as accurate. I'll take the better group over a few fps. I'm tweaking jump and a few other variables to tighten the group.</p></blockquote><p></p>
[QUOTE="osok-1k, post: 1504813, member: 106259"] I believe that volumetric efficiency is very important in any cartridge, to that end the 6.5-284 or 260 AI would be at the top of my list in terms efficiency for the bullet weight / velocity you desire, which I agree with from a practical side. I didn't notice your intended purpose for the rifle which is also a huge factor. I just built a 6.5 Creedmoor with a Curtis Axiom and Bartlein 9-8 gain twist at 25 inches, Trigger Tech Diamond trigger and cut the chamber with a PTG match reamer for slightly tighter chamber tolerances. I'm loading Petersen small primer brass, settling 42.2gr of H4350, CCI 450 primer and Hornady 143ELDX .020 off the lands. I got an average of 2775 with my Magnetospeed. Sub 1/2 moa groups in strings of 5 (with Magnetospeed attached). I also had a few test rounds at 42.6 which bumped it to 2840 but not as accurate. I'll take the better group over a few fps. I'm tweaking jump and a few other variables to tighten the group. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 - 2900 ft/s most efficiently?
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