I have used the 55 grn V-max's and wasn't impressed. I found they would consistently splash on a shoulder shot (or upper front leg if you want to be specific)
Others on this site have reported different results with them. I don't know if they shoot less coyotes then me, or if they are more picky about their shots or what the deal is.
I have seen 50 and 55 grn soft points work well on a number of different coyotes, from a number of different guns. The Nosler ballistic tips have worked well for me this year, and for others on this board, Federal loads these in factory ammo.
Choosing a factory round is just as much what works in your rifle, and performs well on game. We can suggest bullets that have done their job on coyotes, but no on knows what round your rifle will like.
If it were me, I would grab a couple boxes of 50-55grn soft points from different manufacturers, some Nosler BT's and Seirra 55grn HP's from federal, and give them all a try to see what your rifle will group the best. I have shot and see a number of coyotes shot with these bullets and they all work well.