Make sure you have the breech plug out of the rifle. Put some solvent in there to help soften the carbon, or if you have some carburator cleaner give it a few blasts of that from each side. Get yourself a nipple pick, a bent over guitar string, wire, a paper clip or whatever you can find and keep that hole cleaned after every time you shoot your rifle. You want to make sure it goes BANG when that bick steps out in front of you.
