Rem,
I checked my mail today. Gettin' antsy already (lol). Got a ??? for ya. I was just seein' somewhere that H322 is good for the 222.
T-T-Tell me, is it T-T-Twew?
TC,
I haven't looked but some powders for a 22-250 may almost be able to throw a double charge in 270 so be careful with real quick for case powders. Better to get 2 different powders, one for each.