Do you have a drum or a snail? My first BP rifle (still have it) has a drum and it was not lined up right so the hammer would not strike the nipple square. Used a wrench and vise to turn the drum, problem fixed. Same issue with a Hawken, so no drum to turn. Had to take the hammer off, heat it and give it a bend. Once fitted, I heated it and dunked it in mineral oil. Been working for 10 years. You would think they would never leave the factory that way???