I tried only two powders and a few loads.
The first 168 TSX using 50.0 gr IMR 4064 (Barnes published max load) that shoots 1" @ 200 yards. Switched to Big Game 55 gr that added 110 fps & still shot 1" @ 100 yards.
I tried 180 T-TSX's with 54 grs Big Game that shot 1.25" @ 100 yards.
