Revolver problems

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JAG1949

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May 26, 2018
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I recently acquired a S&W 625 .45acp revolver. I'm sure it was owned by a competitive shooter because the trigger has a stop installed on the rear surface and there is a ball detent in the top of the crane which securely locks the cylinder in place. The problem is when the trigger is pulled quickly for rapid fire the cylinder often jumps two chambers rather than just one. It cycles normally in slow fire and single action. Upon initial examination I determined the hammer block had been removed. I understand this is a common but by no means safe procedure to speed up the action of the revolver. I replaced the hammer block but it made no difference to the skipping problem when in rapid fire. All this testing has been done with a empty pistol. I'm not about to risk life and limb with a mistimed revolver. Returning it to S&W is an option but I'm comfortable replacing parts on the gun if I know where to start.
 
How does your cylinder stop look and how do the stop notches in the cylinder look? Cylinder skip is often cause by these parts being peened from lots of use. A lot of fast double action shooting can peen corners and form burrs as the metal deformed and this starts causing the cylinder skip problem.

I would hop over to Brain Enos' forum and ask those guys in the Revolver sub-forum for come guidance. There are a lot of very serious and knowledgeable competitive revolver shooters in the revolver sub-forum and this problem is fairly well understood over there. I am sure they can diagnose your cause and give you a good solution to move forward with.
 
Thanks. I posted there too. The notches look sharp and there are no burrs whatsoever. The cylinder lock is shiny but does not exhibit any actual wear.
 
The notches look sharp and there are no burrs whatsoever.
Interesting.

The last time I saw something like that is was peening of the bolt notch. It had raised enough of a burr in the leade to form a slight "ramp" that was causing the bolt stop to "skip" over the notch
 
2nd on the cylinder stop spring. If its installed correctly, check it to see if it's in good condition and hasn't been shortened/altered. With the hammer block removed, it makes me wonder if someone roamed through the gun altering things in an attempt to improve the DA trigger pull. If they gave the cylinder stop spring some attention, it may be too light to operate the cylinder stop fast enough to lock the cylinder when the gun is being run fast.
 
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