Back to the range today and switched to 100 grains of Pyrodex R/S behing the 300 gr XTPs. No wind to worry about and the groups were much better. Made a couple scope adjustments and my final group at 100 yards was two shots touching (figure 8) and the third 1" left, and I called the third one when I touched it offas I pulled it slightly. [:@]
Since season opens Monday I'm going to use that load for now.
One odd thing - the crud ring was worse with the Pyrodex R/S than T-7 ffg.
Also tried one shot without cleaning between shots and it really blew out of the group (3" low/right).