Bowlseye: My heavy barrel Sako L-46 shoots the wonderful Berger 52 grain Varmint bullets so well (and so lethally) I have never tried anything else in it!
I use Norma brass, Federal 205 M (Match) primers and H 322 powder to attain excellent accuracy in my Sako 222.
Best of luck finding a "good" load and if you run across any Berger 52's give them a try.
Hold into the wind
VarmintGuy
