Re: 600yd DPMS Arctic Panther Ar15???
When you say you want your rifle to pull double duty as a predator rifle and a target rifle, this can be done with a variety of calibers. An 8 twist 223 will make a fine 600 yard target rifle with heavy match bullets. When it comes to hunting coyotes, cut that range in half and the rifle will do well. If you desire to take a coyote at the further distances, something with more case capacity and fires a heavier bullet than a 223 is a wise choice.
.308 Howa 1500, varmint supreme. 24" .820 barrel, Roedale precision brake.
.223 Howa 1500, varmint supreme, 24" .820 barrel.
RRA 20" predator pursuite, Magpul PRS, ALG trigger,