I've yet to shoot anything but a target with my .223 but I'm interested in trying some Partitions or Federal Fusions on whitetail.I've had a lot of different rifles but I prefer the 223 Rem. Down here, you can get a lot of shots so I don't handload for the one I have now. I stay with the 55 grain SP's, usually Hornady.
I'm shooting the Howa with a 1# Timney trigger, green over molded stock and the Nikon M223 4-14x scope. Nice little rig. I usually have it in the truck all the time except hunting season.
The cartridge is smallish but I've killed a lot of pigs with that caliber. Wounded a few also but I'm not going to let a live pig get away just because my rifle is too small. Once shot one too far back and another forum member shot it later only to find a 55 grain bullet in its haunch. You still need to shoot them in the right place with any caliber but I have confidence in the round.
Our Coyotes are pretty skinny, and might go 15-20 #. Sometimes bigger.
So, its a perfect round for those guys.