1911 45 Trigger,s

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1911 45 Trigger,s Empty 1911 45 Trigger,s

Post by jscot111 on Tue Feb 04, 2020 1:25 pm

I,m trying to discover why when dry firing my 45's one of them jumps ( the dot jerks around the black) at release when my others stay rock solid in follow thru. Could the over travel be too short?
Scott

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Post by Wobbley on Tue Feb 04, 2020 1:41 pm

You could also have the hammer hitting the slide ever so slightly when it falls.  This could be from a hammer and pin having too much clearance. Or an off axis firing pin hole in the frame.
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Post by jscot111 on Fri Feb 07, 2020 4:42 pm

Thanks for the reply, I don't think the hammer is rubbing on the slide. If I cock the hammer with my thumb it's noticeably harder to cock than other 45's. I firmed up my grip a lot and its much better.

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Post by DA/SA on Fri Feb 07, 2020 5:16 pm

Sounds like it just has a heavier main spring that the others.

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Post by Aprilian on Fri Feb 07, 2020 5:25 pm

Could be something loose in the sight.  I assume you checked the rail mounting screw and the tightness of the rings?

If I were in your position, I might try swapping items from one to the other to see if you can move the symptom.

Do a test before dry firing the one with the dancing dot.  Give the optic a strong forward push to see if the slide has not moved fully into battery.
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Post by Wes Lorenz on Fri Feb 07, 2020 9:15 pm

I had the same problem and checked the obvious common issues.
It turned out the the mainspring housing bore had drill gauling grooves from manufacturing.
This caused the upper edge of the mainspring to catch on the groove as the hammer fell.
Polished the grooves out and it fixed the problem.

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