I've got a Stevens 200 action, Criterion 6BR, 28" bull barrel in a Devcon bedded Bobby Hart stock that I can't seem to find the sweet spot of. I've tried Sierra 107 and 85 gr using Varget and H4198. I load at my range and do 3 shot groups. I just shot 12 groups going up .2 gr of powder using forester dies and I'm extremely frustrated. It would shoot the first two rounds in the same hole then throw the third round maybe 1/4" off. It did this on 9 of the 12 groups. I measured all groups and averaged out to .457" which I know isn't bad but it isn't great either. I'll not be satisfied until I can shoot 5 groups in a row in the same hole or at least all 3 shots touching. Am I asking too much from this setup?

BTW, I shoot 3 shot gps to keep heat down and save time while load testing.