I know you said you wanted to stay away from match bullets...but the 77gr nosler custom competition with cannelure has worked absolutely fantastic for me in my 20" 1:8 .223 wylde loaded to 5.56 speeds. .22 hole in, vitals turned to mush, and either no exit, or a 3" exit just depending on the coyote. Exits often enough I wouldn't choose it if I was saving pelts, but it absolutely hammers them for a 5.56 load.
I haven't tried the version with no cannelure, it may work just as well on predators, but I figure the cannelure, while very shallow on the nosler, still gives a good spot for fragmentation to start.
