The only shotgun i have seen out pattern my TK2000 is my 10ga BPS shooting 3 1/2" Heavyshot 13 through a wad wizard tube, that setup cost me twice what i gave for the TK.... i killed my first bird with the TK2000 (me and a friend doubled) ever since then i was hooked. I shoot 100 grains of 777 pushing a hull full of copper plated #4's.