Hi all. Hope you busy pistolsmiths can find one or two extra minutes to help me with a trigger problem.
First off, let me set the scene. I have 4 series 80 Colts and have done the triggers on all of them. 3 are GMs and 1 is an Officers.
3 of them have sweet, smooth and light (3# +/- 1/4#) triggers. My problem is with the 4th one.
When the slide is off, it is perfect. Smooth and light. When it's the slide is on, three things happen.
1. It "grinds" and, in general, feels like a bad trigger.
2. It is between 3-1/2 and 4#s when I weigh it, but when I shoot it it changes pull weight, randomly, to as much as (guess) 8 or 9 #s for one round, then back to 4, then to 6 (guess) and so on. (Afraid to weigh the trigger pull, loaded.)
3. With the slide on it gains as much as 2#'s over the "slide off" pull weight.
I have spent many hours sanding, polishing, and adjusting firing pin safety mechanism, sear springs, trigger bow, disconnector, etc. and can't seem to get this one to act properly.
The disconnector is within spec's (Kuhnhausen's book), and doesn't seem to be rubbing on the slide as far as I can tell.
Is there something I'm overlooking that could cause these kinds of problems?
Thanks for listening (reading). And I appreciate any advice.
Walt
First off, let me set the scene. I have 4 series 80 Colts and have done the triggers on all of them. 3 are GMs and 1 is an Officers.
3 of them have sweet, smooth and light (3# +/- 1/4#) triggers. My problem is with the 4th one.
When the slide is off, it is perfect. Smooth and light. When it's the slide is on, three things happen.
1. It "grinds" and, in general, feels like a bad trigger.
2. It is between 3-1/2 and 4#s when I weigh it, but when I shoot it it changes pull weight, randomly, to as much as (guess) 8 or 9 #s for one round, then back to 4, then to 6 (guess) and so on. (Afraid to weigh the trigger pull, loaded.)
3. With the slide on it gains as much as 2#'s over the "slide off" pull weight.
I have spent many hours sanding, polishing, and adjusting firing pin safety mechanism, sear springs, trigger bow, disconnector, etc. and can't seem to get this one to act properly.
The disconnector is within spec's (Kuhnhausen's book), and doesn't seem to be rubbing on the slide as far as I can tell.
Is there something I'm overlooking that could cause these kinds of problems?
Thanks for listening (reading). And I appreciate any advice.
Walt