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P938 trigger pull

This is a discussion on P938 trigger pull within the SIG Sauer Pistols forums, part of the SIG Sauer Forum category; P938 is still flawless after 300 rounds of all 115 gr (independence and american eagle) and a few critical defense and powerball for defense testing. ...


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Old 04-23-2013, 11:43 AM   #1
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P938 trigger pull

P938 is still flawless after 300 rounds of all 115 gr (independence and american eagle) and a few critical defense and powerball for defense testing. I had a question on the trigger pull. Sometimes when i pull the trigger it is a very crisp break and sometimes it feels a little spongy and has more take up. Has anyone else noticed this? It really isn't an issue other than consistency in the pull itself when practicing, but I figured it wouldn't hurt to ask.
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Old 04-23-2013, 01:39 PM   #2
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I noticed my trigger pull was spongy, and gritty feeling, when new. I noticed it was not gritty, not spongy, and sharper breaking, measuring 4.5 lbs, after dry-firing it a few thousand times.

I never noticed any difference between one pull and the next, though. It's hard to comment on what one says one "feels".
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Old 04-23-2013, 01:45 PM   #3
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I would say no matter how the trigger feels, it should be consistent, even as it breaks in. I got rid of the plastic trigger and went to a SS one which improved the trigger process substantially. I also found that treating the trigger assembly with SEAL1 made it perfrom much more smoothly. Those two things have made a BIG difference.
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Old 04-23-2013, 01:50 PM   #4
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Depending on when the, "spongy," happens, it may be as simple as grime and dirt in your trigger after you've fired a few rounds. I have noticed the same will occasionally happen when I am shooting dirtier ammo in my 229 (though not the 220, which is just a dream, all the time).
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Old 04-23-2013, 02:55 PM   #5
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SouthernYankee, when you say "treating the trigger assembly" would you possibly be able to explain what areas you mean, or direct me to a diagram that shows where. much appreciated. thanks
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Old 04-23-2013, 03:25 PM   #6
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I have been trying to figure out a better way to word what i am experiencing. this is the best i can come up with. There are times when trigger breaks crisply/cleanly and times when i can feel "creep" in the trigger. Not sure if this helps at all but maybe any gunsmiths lurking on here can comment.
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Old 04-25-2013, 11:45 AM   #7
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just wanted to bump this to see if anyone else had any ideas. Through the last couple range trips it seems to be getting better. But i still do notice an inconsistency in the pull. It may be just me and my OCD. And it may be as simple as how i am resting my finger on the trigger (inconsistently). thanks everyone.
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Old 04-25-2013, 07:51 PM   #8
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I've got the same thing. It's kind of soft on a slow trigger pull. Right at the break point. I've been playing with it to try to see if I can figure it out. I found that if I keep tight pressure on the left side of the grip it does not happen. It did not start for me till I replaced the metal grips with Houge finger grips. With the grips removed, it is alway soft. It does not seem to occur with the metal grips installed.
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Old 04-25-2013, 07:55 PM   #9
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I have the sport model which came factory with the rubber grips. I think we are on to something here. I have no idea what, but it's a start. Any ideas anyone?
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Old 04-25-2013, 08:02 PM   #10
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I wonder if the inside of the rubber grips are pushing on the trigger bar?
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Old 04-25-2013, 08:18 PM   #11
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Quote:
Originally Posted by edlloyd View Post
I wonder if the inside of the rubber grips are pushing on the trigger bar?
Possible but as you can see below the 238 & 938 trigger bows run only along the left grip. The trigger bow is easily moved inward but the inside of Hogue grips are lined with a stiff plastic that would likely prevent interference.



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Old 04-25-2013, 08:27 PM   #12
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If i look at my trigger bar with the hogue grips on it, it appears to me that the bar is resting right up against the back (the hard plastic part as mentioned in the above post) of the grip.
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Old 04-25-2013, 08:28 PM   #13
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Quote:
Originally Posted by edlloyd View Post
SouthernYankee, when you say "treating the trigger assembly" would you possibly be able to explain what areas you mean, or direct me to a diagram that shows where. much appreciated. thanks

Note: I am not a GS , so use good judgement, something I don't always practice

Look at the pics in my post 11 above.
If the trigger and trigger bar are removed, carefully polished to mirror shine on the outer side that rides in the frame slot and well treated with a dry lube it should remove some of the grit and drag in the pull. The trigger bar track in the frame should also be dry lubed after checking for rough spots. This worked well on my 938.
Warning, punching out the trigger pivot pin on these guns is a PITA as they are firmly pressed in. I used a small nail set that had a tiny cup in the face to hold the pin to get it started, then finished with the proper sized punch.
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Old 04-25-2013, 08:31 PM   #14
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If i look at my trigger bar with the hogue grips on it, it appears to me that the bar is resting right up against the back (the hard plastic part as mentioned in the above post) of the grip.
Yes, but I would guess that Hogue took that into their design........not their first rodeo. And the trigger bar would also rest against the inside of any type of grip used.
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Old 04-26-2013, 05:35 AM   #15
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With the grips off, slowly pull the trigger. If yours works like mine, you will see the linkage move ever so slightly out of the frame. When it does, you should feel the soft spot in the trigger. Now put just a little pressure on the bar and pull the trigger slowly again. It should be gone. To me, the metal grips hold the bar in tight, where the Houge grips allow for just a small amount of flex. I also have a stainless trigger and my gun is clean and lubed.
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