Well, you were all right on with the diagnosis: the rear of the firing pins had flared out enough to prevent easy removal.
I followed Patriot USA's procedure and was able to drive them out. The offending pin was a hair shorter, but not enough to cause the misfires. I found that the tips were a very tight fiction fit in the bushing holes, which would have contributed to the problem. I dressed them down a bit with a fine file so they fit through the bushing and action holes easily.
Hopefully, this will solve my problem without having to buy new firing pins. I'll try it out on Tuesday.
Thanks again for the great advice.
