Here's my entry for the rifle portion of the May target. I tried several sight pictures to hit the penny with only partial success (and the red dot didn't help much at all). What I am posting below was shot with my .50cal. Lyman GPR cap lock using .4885" RB's that I cast + .018" pillow ticking patches wetted with 1 Ballistol : 6 water. The powder and charge was 50gr. GOEX/Graf's FFg.
Note: Just as I wouldn't take my pinned bbl. flintlocks apart after each range session, I'm learning to do the same with the GPR since it's shooting so well. I.e., I clean at the range and will recheck and oil the bore, etc. in a little while.