For 15-16yrs I used a 24" heavy barrel Olympic 243wssm AR upper on my Bushmaster lower. Of all of the predator rifles I owned. This was my ideal coyote rifle. It didn't kill coyotes any quicker than most high powers. But where it shined. Was it's wind cutting ability. I used only mfg Winchester 95 gr silver ballistic tip ammo. Most of my coyote killing was while shooting prone. The 95gr Win SBT. Cut through stout quartering & crosswind shooting. Making very tight groups @ 1/4 mile. 4.5" or less groups was the norm.
Unfortunately, Olin I believe was the only maker of the 95fr Win ammo. They suddenly they stopped making it. So I sold that upper & went back to using the heavy barrel 223 Bushmaster upper. Which was also very accurate. Shooting the win 45gr jhp(varmint pack) & the 55gr Win silver ballistic tip ammo.