Best kept secret is the white box .223's at Wallmart, 45gr HP with a crimp type nose, most rifles shoot them very well and they are more than enough for a Coyote. Most serious fur hunters use 25gr Bergers out of a 17 Remington, I use the 30gr Berger HPBT, so even the 45gr bullets are heavier than you need. The heavy bullets will make one big hole and one little hole, when all you need is the one little hole. Larry