I have a Remington SPS Tac with a 20" 1:9 barrel, and it shoots 75 gr. Hornady BTHP bullets as well as anything else (best is 7/8" at 300 yds). I run those on top of 23.0 gr. of TAC powder. I've tried factory Hornady 73 gr. ELD, and no bueno. Patterned more like a shotgun. Good luck!