I almost gave up on my Chazsel .222 12 twist barrels for my condor builds..At first 55 grain and 45 grain arenal hitting sideways..I had the power turned up??Anyways bought some 36 .223 NSA slugs...They would stablize and only shoot on the low end ,,everything turned town 2500 psi..So for the heck of it I tried the 47 and 55 grain slugs..With everything turned down they are stablizeing..This valve has the power,,but anything super sonic crazy inaccuate and unstable.. Im learning..Getting a 9 twist .223 barrel soon!!!