Try the load printed on the front of H4350 with 75 grain vmax, its a screamer in a Sendero (3700fps)if I remember right. I also use varget with 75 grain v-max's loaded to around 3400/3500 fps out of another rifle with a 24" tube. 100 NBT under Reloader 19 using Nosler manual recomended accuracy load has also been a favorite.
These have worked for me. I got these loads to work up for accuracy the quickest so I have not spent any more time with the 85 NBT or any 90 grainers. I do think that a little less explosive bullet than the vmax, such as the ones used for medium game in the 80/90 grain range, with a non temperature sensive powder like H4350 might be ideal.
One thing about it, when you hit a coyote at 400+ yards you see the differance in using a heavier caliber that shoots flat. If you can hit them, they are pretty much down.