I got out to the range with some 130 grain TTSX's over Varget powder (48.5-51.5 grains). They had me worried because I couldn't even get groups for the lighter charges, but once I got up to 51.0 grains of powder they came together, and 51.5 grains was the best. Now I'm going to work between 51.0 and 52.0 grains in 0.2 grain increments and see if I can zero in on a good one. These TTSX's must just want to be driven hard, at least in my tube.