I have one in a 20 ga and love it. I shoot Remmington Core-Lokt. At 50yd it shot through the same hole, 100yd 1 1/4 inch groups, and playing around at 150 I could almost hit a pie plate consistently. And as for the knock-down power, absolutely brutal. The first buck I shot I hit directly in the heart from about 70yd. When opened up his chest, his heart fell out in 3 pieces. Never had one run over 25yd shooting these. The best part about the gun is that I have less than $400 in the gun and scopetogether.Great gun, great slug!!!!