Went to the range to test the lyman slug with universal powder. I have tried blue dot and herco but did not have much luck. I belive I have found 2 loads that my USH likes. Both loads shot at 50 yrds, avg vel 1369 fps. for GM load
Load 1 on the left
29.0grs universal
Win.209 primer
WAA12F114 wad
federal GM hull
Load 2
26.0 grs. universal
Win.209 primer
WAA12F114 wad
Remington STS hull