10-04-2020, 02:24 AM
This is exactly the question that I've been wanting to ask as well. I put together a decent upper, but I'm getting very poor accuracy so far with Hornady Black and Hornady Custom. The Black ELD-Ms average 2.75" at 100 yards, the Custom SSTs much worse, so much so that I didn't bother measuring them.
I would try different ammo, but I can't find other ammo. I built this upper in the middle of a "pandemic" and an election cycle, so.. I'm saving brass and will be developing loads as soon as I can pick up some small rifle primers and powder.
I'm blaming it on the barrel, a Sanders Armory 24" Stainless 5R 1/8. I wonder if it's a whippy barrel? Did they send me a lemon? If I have it chopped down would it stiffen up? Like Klem said, is a long heavy barrel on an AR15 upper a mismatched pair? The receiver is 7075 Aero.
I didn't bed the barrel into the receiver, but if the barrel I bought is a lemon, I'm glad that I didn't. When I get one that shoots well I'll bed that.
I would try different ammo, but I can't find other ammo. I built this upper in the middle of a "pandemic" and an election cycle, so.. I'm saving brass and will be developing loads as soon as I can pick up some small rifle primers and powder.
I'm blaming it on the barrel, a Sanders Armory 24" Stainless 5R 1/8. I wonder if it's a whippy barrel? Did they send me a lemon? If I have it chopped down would it stiffen up? Like Klem said, is a long heavy barrel on an AR15 upper a mismatched pair? The receiver is 7075 Aero.
I didn't bed the barrel into the receiver, but if the barrel I bought is a lemon, I'm glad that I didn't. When I get one that shoots well I'll bed that.