I'm shooting an AR I built with a WOA 24" 1-10 twist & also a Kimber 1-12 twist bolt gun. Both shoot 35 gr. Berger's excellent with X-terminator or Accurate 2230 (same exact powders) or with 39 gr. SBK's loaded with RL 10. Both give great velocity. Go to 204 Ruger.com & look in the posts for reloading then best loads. There's bunches of loads & a great site for 204 shooters. Also, with the Berger's, larger predators like cats & coyotes don't run off when shot. They are awesome!
Jim D