Lil'Gun is a good choice. Also 4227. Unique is too fast for jacketed bullets. Some of our ASSRA club shooters are using AA4100 and/or Ramshot Enforcer (same powder, different can), but that's with heavy cast bullets. Accuracy they get at 200 yards off the bench will astound you. Can't quote you charge weights, but I'd start at 8.5 grains with your typical 75 to 86 grain jacketed.