So I have about 5000 62 grain pulls ( I bought cheap and stacked deep ) and happened across a video of a guy shooting 223 subs . I have a couple of cans of trail boss so I went to work . I settled on 4.8 grains of trail boss which crossed my chrony at 1050 fps . I fired 10 shots into cardboard to make sure I didnt have any keyholing or tail wobble going on . I was happy so I stuck my can on my mvp thunder ranch and put up a target at 25 yds . I think I have a new squirrel hunting round .