I hunt on a clean barrel. Before I load to go out I take a patch with rubbing alcohol and clean the oil out and follow by 2 dry patches. Barnes Expander MZ and 100 grains of Pyrodex pellets. Target is a 6 inch shoot-n-see at 100 yards. 1,2,and 3 were in there and 4,5,and 6 started to open up. I didn't do anything between shots except load back up. Hits about 3 inches high at 50 yards. This target was shot this past summer.