Try the Hevi 13. I shoot in both my 12 and 20 with a Wrights Superior Choke. ABSOLUTELY impressive!!!!!!!! Stewart set the bar for choke tubes with Hevi 13 and took 4 World records with his tubes. His 20ga tubes outperformed the 12's!!!! Hevi 13 out performs regular Hevi-Shot!!!!!! It is intended for turkey tubes and preformance.