Full metal case on a coyote or wolf is crazy.You will loose plenty unless you have good tracking snow and the stamina to go a long way.Sure you can get lucky, but I don't believe for a second anyone recomending full metal jackets has many kills to talk about. Ive seen several wolves drt with a 222 55 gr. sp sierra,and one at 70 yd. drt with 22 hornet 35 gr.vmax square behind the shoulder.If I was in Idaho Id use my 243 with 80 gr. psp loaded to the max. I was just talking to Mr. Kindler and he sell's 17 cal. 30 gr. woodchuck golds to wolf hunters in Alaska that use the 17WCH at 4300 fps and they wouldnt use anything else.That 17 WCH is one impresive round.