i recently had my Rem 700 XCR 300WM threaded cause I wanted a brake. I am a big guy, 6'5, 330lbs, and after shooting my 300WM 10 rounds, i would flinch some, and I never have flinched before and my groups would open up to 1.5", when shooting expensive 300WM that was unacceptable to me. I worked...