I have killed 5 coyotes with the black hills 68gr match hps, of the 5, 2 had a small entrance and no exit, the other 3 had holes the size of cantelope, all hit the dirt upon the shot. I shoot them out of my 16" bushmaster postban and they group really well (little less than 1MOA), its a 1-9 twist. They group better than any other round I have tried, I would like to go with something a little lighter in the future if I could ever find something that grouped as well. I shot through a chrono last year with these rounds and I believe I was getting about 2680 fps or something around that, pretty slow for a .223 but they group fine and I can hit a paperplate everytime at 300 yards off of my shooting sticks so I figure that will do for yotes. Hope this helps