If you do use hevi-shot, you must use a choke that is made to handle it, you can also shoot lead in these, but you cannot shoot hevi-shot in a lead only tube. The hevi-shot has more down range energy, but pattering is more important, just like shot placement, find a load your gun likes and find a range it likes, sometimes it takes a lot of experimenting. FYI, my dad uses in his Nova, Undertaker Hevi-shot tube, and the old Remington Hevi-shot 3 1/2 # 5 shot. Remington doesn't make Hevi-shot loads, now it is call Wingmaster HD. I haven't shot any yet, I still have a couple boxes of the old Remington Hevi-shot.