I just started using a 52 grain Sierra Match King. Worked up a quick load that was real accurate. I've killed 6 or 8 coyotes this month and all were flop dead. However, 2 had large entry wounds about he size of a tennis ball and no exit.They didn't run but they flopped on the ground for a good while. Made me a little concerned about them working reliably . The rest were either little entry and no exit or exit the size of a softball . Im shooting them out of a 22-250.