SIGforum
Trigger Bounce?

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https://sigforum.com/eve/forums/a/tpc/f/430601935/m/6160046134

October 11, 2017, 07:42 PM
modbuilder
Trigger Bounce?
I let a buddy try my P238 at the range, and while he was shooting it, he said he had a "double shot". I'm guessing it might have been recoil causing the trigger to bounce to the reset quickly while he still had pressure on the trigger. Has anyone else experienced a problem like this? Any suggestions?
October 11, 2017, 07:55 PM
Jus228
I've had that happen before with a really fine 1911 trigger. It happened when I was unfamiliar with the pistol. Once I shot it more I got used to it and it never happened again.


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October 11, 2017, 09:02 PM
Fenris
Bump stock?




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October 11, 2017, 10:08 PM
mrmn50
I have had that happen with my P226 9mm Tac Ops. In fact, it has happened to me with any of my Sigs that have an SRT.
never happened with my P250 in any caliber.

My thought are, that I am the problem. Maybe the case with your friend?
October 12, 2017, 12:11 AM
CandyMan.45
Probably a combination of a short reset and limp wristing the pistol plus recoil equals double shot...
October 12, 2017, 06:52 AM
mrmn50
^^^^^^^^^^^^^^

More than likely what I was doing at the time.
From memory, when I am not focusing on what I am doing, mechanics wise, it is more likely to happen.
October 12, 2017, 11:33 AM
Pipe Smoker
The nub of the gen 1 MSH that locates the sear spring can wear down. The sear spring then creeps out of position. Double-firing has been reported as a consequence by some folks. The fix is to buy a gen 2 MSH and sear spring. Those don't cost much, and SIG CS might even send them to you for free.

Another effect of the sear spring creep is that the trigger pull gets lighter.



Serious about crackers
October 12, 2017, 12:29 PM
mrmn50
Any idea as to round count when that wear down can occur or is it totally random??

BTW, thanks for this input.
October 12, 2017, 12:38 PM
Pipe Smoker
The wear of the gen 1 MSH nub is unpredictable. Many P238s never suffer it. It's much more common on the P938s (which have the identical MSH).



Serious about crackers
October 12, 2017, 12:56 PM
mrmn50
Thanks, I could not find any data on the P226.

More and more, as I think about it, I am tending to think it is my fault.
Back to the wrist exercises!!
October 13, 2017, 12:09 PM
modbuilder
quote:
Originally posted by Pipe Smoker:
The nub of the gen 1 MSH that locates the sear spring can wear down. The sear spring then creeps out of position. Double-firing has been reported as a consequence by some folks. The fix is to buy a gen 2 MSH and sear spring. Those don't cost much, and SIG CS might even send them to you for free.

Another effect of the sear spring creep is that the trigger pull gets lighter.


I'll have to look at my MSH. I doubt that it's the Gen 1 design because the gun date is Oct 2016. Good idea worth checking.

I bought the gun used, but it didn't appear to have had much use. I guess a worn sear or maybe a weak main spring could contribute to making a double shot. It happens so fast that your not even sure it's happened unless you keep track of how many rounds you've shot from the mag and stop and count what's left.
October 13, 2017, 05:53 PM
modbuilder
Talked to my buddy today who originally reported the double shot with my p238. Seems he has 3 other pistols, two from S&P one from Colt, and has experienced the same event with all of them occasionally. He thinks it's not a problem that is specific to my gun, but rather something caused by the operator when not paying attention to his shooting fundamentals.

Not sure I totally agree, but it's somewhat reassuring that it may not be a problem with my pistol. I'll base my final opinion on how it runs for me.
October 13, 2017, 06:25 PM
jbcummings
quote:
Originally posted by modbuilder:
Talked to my buddy today who originally reported the double shot with my p238. Seems he has 3 other pistols, two from S&P one from Colt, and has experienced the same event with all of them occasionally. He thinks it's not a problem that is specific to my gun, but rather something caused by the operator when not paying attention to his shooting fundamentals.

Not sure I totally agree, but it's somewhat reassuring that it may not be a problem with my pistol. I'll base my final opinion on how it runs for me.


Yep, I’d say he’s got the right of it. Evryone’s probably done it at least once. I did it lately with a P224 after Robert Burke did a carry action job on it and put in a QTR trigger. No creep whatsoever. It makes me look good when I do my part.


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