I do not have a Varmit rifle right now. the only guns i own are 20ga 870 ,12ga 870 super mag, 7400 30-06 and a 597 22lr. When it is gun deer season it is only a shot gun zone but that wouldn't matter for coyote you can use pretty much anything ya want. I might try some of that dead coyote shot in the future but right now i am on Lay off from my job becasue the construction around here is so slow and money is tight with a 2year old son. But i was thinking about trying some buck shot maybe 4 or 00 also whats the tightest choke you can shoot buck shot from? And whats the tights you can shot that dead coyote from?