The underwood puts groups centered in the bullseye at 100 yards, with the center sitting on top of the post, and the rear sight showing "2" in the notch. Using LC and BVAC lately. Gonna try my first handloads for 30 carbine soon, and see how that compares. Pretty confident that if I ever needed it for something more serious than punching paper it would be very effective, at least at 100 yards.