I took four coyotes this year from my deer stands, 7mm. Rem. Mag., 140 grain TSX.
One I caught through the bottom lip at about 40 yards, dead level with her, it was not fur friendly to say the least. There was, for sure, no tracking involved.
The other three were lung shots, at standing dogs at a little over 100 yrds., one in snow. Man, that was impressive. Picked up the splash with the scope with no problem. Blood spray at a measured 17' into the brush of the edge he was slinking down, easing up on doe and fawn feeding in a food plot. 7mm. hole going in, about the size of nickel going out. Split them to see what the damage to lungs was, just like with the deer I took with that combination, mush was all that I found.
May not be the thing for one hole kills, gentle on the hide, but it will really put their lights out to use an old southern term for lungs!