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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Thoughts on 264WM vs 6.5 PRC for new rifle build/buy?
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<blockquote data-quote="benchracer" data-source="post: 1647826" data-attributes="member: 22069"><p>The .264WM has enough case volume that deep seating the bullet isn't a negative. Even with bulky, slow burning powders, you wont run out of case capacity before you reach pressure limits. IOW, long OAL's are not necessary for maximum performance. If you have enough chamber/mag length to seat the bullet with the ogive above the case mouth, you are good to go.</p><p></p><p>I don't have 147's to measure for you, but JBM ballistics has the OAL of that bullet listed at 1.440, with a tip length of .142". Anecdotally, I have fired that bullet from a 9 twist Swede, in cool temps @ 3500 ft asl, and it stabilized well enough to hit point forward and left round holes in the target. A good friend of mine has a Savage Target rifle in .260 Rem. The 147's work very well from the 8 twist barrel on this rifle @ 2750ish.</p><p></p><p>ETA: I am shooting up my supply of 140 AMAX's. OAL is .010 off the lands @ 3.320". Running 3130ish with 66.7 grains of Retumbo in the factory 26" 9 twist barrel. This is a very mild load.</p></blockquote><p></p>
[QUOTE="benchracer, post: 1647826, member: 22069"] The .264WM has enough case volume that deep seating the bullet isn't a negative. Even with bulky, slow burning powders, you wont run out of case capacity before you reach pressure limits. IOW, long OAL's are not necessary for maximum performance. If you have enough chamber/mag length to seat the bullet with the ogive above the case mouth, you are good to go. I don't have 147's to measure for you, but JBM ballistics has the OAL of that bullet listed at 1.440, with a tip length of .142". Anecdotally, I have fired that bullet from a 9 twist Swede, in cool temps @ 3500 ft asl, and it stabilized well enough to hit point forward and left round holes in the target. A good friend of mine has a Savage Target rifle in .260 Rem. The 147's work very well from the 8 twist barrel on this rifle @ 2750ish. ETA: I am shooting up my supply of 140 AMAX's. OAL is .010 off the lands @ 3.320". Running 3130ish with 66.7 grains of Retumbo in the factory 26" 9 twist barrel. This is a very mild load. [/QUOTE]
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Thoughts on 264WM vs 6.5 PRC for new rifle build/buy?
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