When I'm coyote hunting I'm also hunting any predator as well as jackrabbit. I could potentially be shooting at coyote, bobcat, fox, badger, and mt. lion.
55gr vmax worked ok for me. On jackrabbit it would destroy a lot of meat. On fox it would blow up pelts, on coyote it killed every one I shot so long as it was a good shot and never saw an exit. I didn't quite trust it either for the larger mt lion. I did head shoot a coyote with one as it was trotting, quartering away, it somersaulted down (thinking it was dead as nuts) so I went after the 2nd coyote it was with. I couldn't find the first coyote, about an hour later it showed up on my trail camera nearby with what looked like a nose shot that then splashed out. I'm guessing it going down was more of a stunned dog.
The green arrow is entry hole, red arrow is exit splash.
typical damage on smaller animals
I tried a 77gr smk b/c it shot well from my AR, but I had two coyotes that were hit (spinning, biting and yipping), went down to the ground, then got back up and took off which I never recovered, never even found blood. IMHO SMK sucks for consistent performance, especially on smaller animals.
I then switched to the Hornady steel cased 75gr tap. Super happy with it. It's the same price as bulk FMJ and great performance on everything!. Drops coyotes, but doesn't explode the smaller foxes like the 55gr did. ALso doesn't destroy meat on a jackrabbit the way the 55gr did. entry frontal shot on left half of neck, bullet went across body and came out right behind front right shoulder, racquetball sized hole.
This rabbit I just shot about 75 yards. The shot entered opposite side, perfect shot behind shoulder. Not a lot to the rabbit to start expansion since it hit no meat/bones, but bullet still expanded and made a quick kill with no meat loss.