I HAVE A SIMILAR ISSUE WITH AN OLD L.C. SMITH. THE PROBLEM WITH THE FIRING PINS WERE THE LEADING EDGES THAT WERE NOT COMPLETELY ROUNDED AND WOULD INDEED HANG IN THE FIRED PRIMERS. UPON DISASSEMBLY, IT WAS DETERMINED THAT THE FIRING PINS HAD BEEN FILED AND NOT ROUNDED PROPERLY. THIS MAY BE YOUR PROBLEM. TIME FOR A VISIT TO A GOOD DOUBLE GUNSMITH.

Luck is the residue of good intention and hard work.