I'm just starting to use a 22-250AI barrel on my 700P
and I'm impressed. I get 3975 fps out of the 55 gr Nosler Ballistic Tips.
I shot a woodchuck at 275 yds on the first shot. Will use it for coyote also and having shot some of those with a 270 win, 7mm Rem mag and even a 7mmSTW. I can tell you it can't be too powerfull. Those animals are tough. I would never consider a .204 or a .223 unless I limited myself to very close shots such as 100 yds or less and even then I'm not sure. Incidentaly only the coyote I shot with the STW fell in his tracks. All the others ran off for a while. The one I got with the 7mm Rem mag ran about 100 feet with a lung hanging out of his chest. My brother in law shot one in the chest with his 308 and the critter ran off dropping some of his innards on the way. I'm not saying you can't dispatch a coyote with a 204 or a 223 but don't send a boy to do a man's job.