I shot my .22 caliber BP rifle yesterday to see what loads and bullets it likes. Tried the North American arms 30 grain bullets with 5 grains of 4f with mink oil lube in the bullet base cup. At 25 yards I got alittle over 1" from the bench using peep sights. I then tried 5 grains of 3f, grouping was slightly tighter, but about 1.5" lower.
Next I tried some 30 grain air rifle slugs from AVS. These are spitzer shaped with a pin hole hollow point and a cupped base that I filled with mink oil lube. 5 grains of 4f gave me 3/4" groups @ 25 yards. 5 grains of 3f also grouped well, but once again about 1.5" lower. There was a significant difference in the report of the two loads. $f had a good crack, whereas the 3f was quieter. More experimenting needed and maybe a higher powder charge? Clean-up was straight forward using the barrel in a coffee can of warm soapy water method, Dry patching, then a patch with Barricade. I did not have to swab between shots which sort of surprised me. The last bullet went down as easy as the first. Great fun!