RODSTRADLEY
Well-Known Member
Building an AR308 in 6.5 CM with a 22" Criterion Hybrid barrel and have one question. Is it worth the time to neck turn and use a bushing die for neck tension like my bolt guns?
BTW I size to .002" tension.
mad an aside properly annealed brass yields.001" grip and this is proven. I feel the difference occurs in how the bullet jacket responds to the friction. That's just my opinion.
Your AR10 will treat brass differently than the bolt guns. And creedmoors are chambered so tight. turn half of your test loads and see if it makes any difference. My AR10 is hard on brass. And the brass is why hotter then my bolts. You can't pick it up right away. If you size your brass like a bolt gun. You can run into feeding problems. i found that annealing and full length sizing with at least.003 tension. Will keep those 140 class bullets from moving when that bolt strips them and slams them into the chamberSo it seams that I should turn the necks and start finding the best neck tension for this barrel. It will be some time before I can get to my range (to muddy) to try all of this out. So for now thanks Rod