So I'm a bit confused re: Grendel Accuracy Potential

[Sinclair]

O311B wrote:

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.

My CZ bolt rifle doesn't like Hornady Black, even my reloads with Hornady components won't Perform. Just maybe you will have to start reloading 6.5 Grendel sooner than you planned with other brand components to get the groups that will satisfy you.