x2 on the IMR-4198 powder. And Rem 7 1/2 BR primers.BONZy said:Its been my experience that the 222 can shine with 40's. I shoot 40 grain Ballistic tips out of a Rem 722 with excellent results.
Try H335, H322 and IMR 4198. All have produced exceptional accuracy and groups for me. If I take it a step further and seat .005 off it gets even better, however the rounds wont fit in the magazine.