My Corlane built Sako 75 in 7-300 Win changes POI 6 MOA when I hang a can on it. The same rifle when it was still a 300 RUM didn't care if the brake was on or not but I sure did. A shot without hearing protection would have you reeling in agony. The radial brake would kick up so much debris that you could add blind to deaf. Shooting it prone was dangerous, not just annoying.