Malfunction question
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Old 04-28-2012, 07:47 AM   #1
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Default Malfunction question

Had my SA mil-spec at the range today for the second time. 1st trip fired 100 rounds with no issues. Today an issue came up. During cycling the slide would stop about 1/4 from full battery. Would not do it each time, but when it did it took some work to get it moving again. Used a variety of ammo with the same results. Only change between trips was a new trigger (longer shoe). Saw on another site that too much pressue on the middle spring/disconnecter could cause this. Could a slightly longer bow on the new trigger be the problem? Need to hear from the 1911 gurus out there.

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Old 04-28-2012, 11:15 AM   #2
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I have a hard time imagining how the sear spring interferes with the slide.

First thing I would do is replace the recoil spring. The recoil spring has more to do with returning the slide to battery than absorbing recoil. Recoil absorption is managed by the recoil spring and main spring. And to a lesser amount, how the frame rails are mating.

Second thing is to check the ammo. Even factory ammo can be out of spec (and you are using factory for at least the first 500 rounds, no?)

The middle finger of the sear spring does push the disconnector up (and puts a little pressure on the slide), but that won't stop the slide.

The only other thing that could cause such a problem is not enough lubrication and parts not broken in to work together.

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Old 04-28-2012, 02:40 PM   #3
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Does this only occur during shooting or can you replicate it by manually cycling the slide? If you can manually replicate does it happen with the mag removed?

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Old 04-28-2012, 09:13 PM   #4
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Try running it wet next time.

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Old 04-28-2012, 09:48 PM   #5
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Next time it happens check to see if the extractor is over the case if so then you are experiencing a push feed, I think you might have to profile the extractor hook correctly, file an polish the hook with a funnel shape toward the front bottom edge. I think you can find the correct tunning for the extractor from Wilson Combat web site.

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Old 04-30-2012, 04:11 PM   #6
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I am unable to duplicate the problem with the gun empty with or without a mag installed. Removed the slide, still lubricated well. As for ammo, issue happened with Remington and Winchester factory stuff. Could not find any obvious rough spots on the slide or frame or foreign material. The disconnecter does feel a little gritty when I push on it but not enough to stop the slide. As I said the first trip it fired 100 rounds with no issues, second trip the problem started after 15 to 20 rounds. Only changes between are a longer trigger ( Ed Brown ) and new grips. Pretty sure the grips aren't the problem!

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Old 04-30-2012, 04:13 PM   #7
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Also looked at the extractor, appears to have the funnel shaped profile.

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Old 04-30-2012, 11:24 PM   #8
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No problem with empty chamber or a round held by the extractor.

Check breech face for burs. Check extractor for dirt (not allowing extractor enough room to work smoothly). Check chamber for gunk.

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Old 05-01-2012, 01:02 AM   #9
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Put the original trigger back on and see if the gun runs.

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Old 05-01-2012, 02:15 AM   #10
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Quote:
Originally Posted by canebrake
Put the original trigger back on and see if the gun runs.
That was my first thought. Glad to hear I was on the same track as the Great One!
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