I have 24" that I built from DSA parts and love it. Never had any feed or ejection problems and have been able to use standard ar mags. It really likes the 107gr match kings for long range targets and the 123gr SST for hog hunting.
Promise you will like the Creedmoor. I have a long range bolt gun and an AR10 that I built. Both are real shooters. The 30 cal can helps with long shots(ding)