Was shooting the federal bulk, cci 40 grain, and winchester wildcat?? Sighted in using federal, they seemed good, but got some low powered shots. Then finished off the cci that I had. The federal and cci went bang every time, I had one dud with the winchester, but tried again and it went off. I didn't group the cci, but I did the federal and winchester. The winchesters were hotter, and grouped better out of my Marlin m60. But the Federal were knocking down shotshells at 75-100 yards consistently.