FINALLY, Got R Done!!! Well I got the barrels lose anyway. Warrior1 You had the right idea. I didn't quite go to the pine tar rag, but I did get some powdered resin. I had enlarged the hole in the blocks some ,
so I clamped them together and ran a skill saw up the joint to tighten'm back up a little. Applied the resin and screwed down the vise with about all I could put on it with an 18" combo wrench. The grip was sufficient now. When they popped loose it cracked so much at first I thought I'd broken something.
Now both barrels snug up in the opposite frames about 180 degrees off(ie the front sight is on the bottom). Of course one is a little long and the other a little short. On the long one the cylinder will go in the frame but the cylinder gap is zero...guess I'll have to shim this one a little. The short one appears to have about twice the desired gap(I seem to have misplaced my flat feeler gauges, so I haven't yet got an accurate measurement). Setting the shoulder back a half turn should make it about right. I count 11 threads with a length of .520", which calculates out to .047" per thread or .024" per half turn, which should make the cylinder gap about right.
Now, any experience or suggestions on shimming or setting the shoulder back? Progress is slow, but I keep telling myself that the Turtle won the race. GOOD SHOOTIN', Walt