PP lube?

[ken s]

I shoot an original Sharps 74 Sport. rifle in 4070 SS.
Jamison brass,
64 1/2 grains Swiss 1+ 1/2 very little compression.
PP 330 Brooks custom 397 1 in 20, with 55Y 7 pound to patch to .403
original bore dimensions. Mag primers. very slight crimp to hold PP bullet.

I wet wipe and dry wipe between shots and get
1 1/2 inch groups at 50 yards for testing. Fine
All are round groups and all are centered perfectly.

NOW, I tried wiping some SPG on the exposed patch before firing and found the gun wipes swipe much easier. and I think the group is smaller. more testing to come...

does anyone use SPG on their patches?