My Tikka t3 shoots great with 27gr's of H322 and 32gr Blitzking, 5 shots will group .625 all day. 39 and 40 gr Hornady, Sierra and Berger bullets and all powder combinations i have tried don't group, they pattern. Also had a Rem 700 heavy barrel that did the same thing, and i tried many different combinations even factory ammo in the heavier bullets with no luck. On a good note the 32gr are great on coyotes, in but not out.
Nice to know about the 32's have a few hundred of them along with a pound of H322 - gonna load some up along with my 35's