Recently finished a 300 blackout build. I bought a thousand rounds of magtech''s 300 blackout, and I'm all over the place at 100 yards. Scope and rings are tight, I'm not aware of any other issues, but that magtech is all I shot through it. I was just wondering if anyone else has had any issues with the ammo. It cycled fine, and I had other stuff to do at the range that day, so I didn't have time to dive in any further.