I took the gun apart. Found no real issues other than some funky knicks and burrs on the hand. I smoothed them as best I could using a whet stone. Put it all back together, grabbed a box of ammo and headed out. The results were promising, but then it misfired again a couple of times, due to what seemed to be light hammer strikes.
This gun has that floating firing pin, and close examination reveals that the pin does not always enter straight through the firing pin hole. Sometimes it appears to be canted slightly upwards.
Is there any fix for this? I must confess that I had never been quite that deep into ANY gun before this, but I have done considerable mechanic work.