Zot,
I'd already considered that one and tested it with the grip safety removed.
Made no difference.
Thanks though.
-------------------
Jim,
Tried that too.
I've also tried replacing the hammer and sear, so it looks like George is right. It's pretty much got to be the sear pin hole just worn out of spec.
It looks like I'm going to have to go with the over-sized sear pin.
That being the case, the pistol will be retired to a place of honor and only brought out for occasional shooting.
I guess it's time to start building up that Les Baer matched Frame and Slide I've been meaning to get around to. (It's been sitting in my safe for a year.)
I won't weep too much, but when I do, I'm going to have something very special to console myself with.
Thanks everyone for the extra heads on the problem.
I appreciate it.
Thanks George, it wasn't the news I wanted to hear, but at least it was accurate.