There aren't too many bullets out of a 223 that won't kill coyotes long past 300 yards. I've pretty much only been loading 40 grain Ballistic Tips for years and they knock a coyote in the dirt right quick. Starting to test the 50/55 grain Bt's and a bunch of the 53 Vmax, and they seem to about as accurate as the 40's, but I'm not sure how they could be any more deadly.....
Find out what your rifle shoots best and go kill stuff...
I use that combo atop a case full of AA2200. Those 40 gr Noslers killed every Coyote I ever hit with them. That was with a 22” 12 twist barrel. One of my most memorable shots with that gun/load was with one of my buddies and his dad. We were out varmint hunting and a crow landed atop an old telephone pole about 500 yards away as we were driving a two track trail. I jumped out and used the truck door as a rest, gave it some Kentucky windage, and blew that crow off the pole shooting left-handed; I’m a righty. Even my buddies dad was impressed. He was a Korean war vet - sniper.
