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Final round jamming

This is a discussion on Final round jamming within the P238, P938 Pistol forums, part of the SIG Sauer Pistols category; Hello all. First time poster here, only after searching through to find similar issues, but not exactly the same. I by no means am a ...


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P238, P938 Pistol All variations P238, P938

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Old 01-10-2017, 09:56 AM   #1
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Final round jamming

Hello all. First time poster here, only after searching through to find similar issues, but not exactly the same. I by no means am a seasoned professional.

I have a P938 that I purchased a little over a month ago. With the craziness of work and Christmas, etc, I haven't had a chance to fire it. I was getting it ready to bring to the range and decided to rack a full magazine through it. 6 of the 7 rounds went through just fine, however that final round gets jammed up. It's not fully seating in the chamber. I've read a bunch of issues with the extractor, but in my case it's not random rounds. It's always that final round.

I've tried two different types of ammo (FMJ and JHP) from three different brands. I also tried two different mags.

Thoughts?






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Old 01-10-2017, 10:09 AM   #2
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Old 01-10-2017, 10:09 AM   #3
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Try shooting the pistol and see what your results are ..
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Old 01-10-2017, 10:11 AM   #4
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djmt99, welcome to the forum from the southwest corner of Indiana.
If I understand you correctly, your problem is the final round in the magazine will not completely chamber.
The one thing that can prevent a round from chambering is resistance to the slide closing completely.
The only difference between the last round in the magazine and those above it, are that it is the only one in contact with the follower.
If possible, check the follower for a burr, or a projection that can interrupt that final round from leaving the magazine. A picture of the follower could be helpful!
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Old 01-10-2017, 10:19 AM   #5
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djmt99, your pictures, of the slide going "home". It is hard to tell, but the 3rd picture looks as if the round is not being stripped from the magazine, and that the slide stop is being forced up.
How many magazines do you have? Does this happen with all of your Magazines?
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Old 01-10-2017, 10:21 AM   #6
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Quote:
Originally Posted by djmt99 View Post
Hello all. First time poster here, only after searching through to find similar issues, but not exactly the same. I by no means am a seasoned professional.

I have a P938 that I purchased a little over a month ago. With the craziness of work and Christmas, etc, I haven't had a chance to fire it. I was getting it ready to bring to the range and decided to rack a full magazine through it. 6 of the 7 rounds went through just fine, however that final round gets jammed up. It's not fully seating in the chamber. I've read a bunch of issues with the extractor, but in my case it's not random rounds. It's always that final round.

I've tried two different types of ammo (FMJ and JHP) from three different brands. I also tried two different mags.

Thoughts?






I would actually shoot it and not rely on manual racking. That will give you the real deal..

Let us know the results..
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Old 01-10-2017, 10:21 AM   #7
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Welcome from Texas.
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Old 01-10-2017, 10:25 AM   #8
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djmt99, also make sure your pistol has adequate lubrication. The stuff that comes on it is mostly preservative, not real good at lubrication. Also your manually running rounds can't compare to the weapon when firing, so do as Whitewabit suggested, and shoot it!
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Old 01-10-2017, 10:44 AM   #9
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I have no experience cycling live rounds through a p938 without actually firing the gun. I'm not sure if the gun would react different if the gun was being cycled due to the normal function of the weapon being fired. I would field strip the new gun (I am making the assumption that the weapon was purchased new even though the original post does not say the purchase was new or used) and properly lubricate it. Load the magazine with some quality factory ammo and take it to the range to see how it cycles.
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Old 01-10-2017, 11:19 AM   #10
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Thanks for the input, guys.

I did read about lubrication. I don't have any gun oil at the moment, but the friend that I go shooting with will have some when we go to the range. I'll lube it up and fire from there.

This did indeed happen with multiple magazines.

This is my first Sig piece. When I manually rack my M&P (full 9), everything goes right through.

I'll be firing it within the next couple days and will report back. Thanks again!
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Old 01-10-2017, 11:24 AM   #11
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Originally Posted by djmt99 View Post
Thanks for the input, guys.

I did read about lubrication. I don't have any gun oil at the moment, but the friend that I go shooting with will have some when we go to the range. I'll lube it up and fire from there.

This did indeed happen with multiple magazines.

This is my first Sig piece. When I manually rack my M&P (full 9), everything goes right through.

I'll be firing it within the next couple days and will report back. Thanks again!
are you going to break the gun down(field strip) at the range and lube it? If not don"t believe you can do a proper job.
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Old 01-10-2017, 01:27 PM   #12
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Congrats on your P938. I can't add anything that everyone else hasn't already but I'm assuming that you're racking through the rounds with the safety on and gun pointed in a safe area right?
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Old 01-10-2017, 01:35 PM   #13
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Quote:
Originally Posted by djmt99 View Post
Hello all. First time poster here, only after searching through to find similar issues, but not exactly the same. I by no means am a seasoned professional.

I have a P938 that I purchased a little over a month ago. With the craziness of work and Christmas, etc, I haven't had a chance to fire it. I was getting it ready to bring to the range and decided to rack a full magazine through it. 6 of the 7 rounds went through just fine, however that final round gets jammed up. It's not fully seating in the chamber. I've read a bunch of issues with the extractor, but in my case it's not random rounds. It's always that final round.

I've tried two different types of ammo (FMJ and JHP) from three different brands. I also tried two different mags.

Thoughts?
Hand-cycling a handgun is not the same as firing the handgun.

Right now, you're "looking for a problem" instead of looking for using your firearm problem-free.

Obviously, we can't really see enough of the gun to tell this but just from what I see - it hasn't been properly cleaned and/or lubricated yet. New guns need cleaning and proper lubrication MORE than seasoned, properly broken-in firearms.

Lube - rotating parts get oil, sliding friction parts get quality grease.

Let us know how it goes after it's cleaned and lubed, and shot on the range.

Thank for stopping in for a visit. Stick around - there are at least two great members here - that would be you and me... The rest - well, the jury is still out...

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Old 01-10-2017, 03:38 PM   #14
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Quote:
Originally Posted by SteveAikens View Post
Hand-cycling a handgun is not the same as firing the handgun.

Right now, you're "looking for a problem" instead of looking for using your firearm problem-free.

Obviously, we can't really see enough of the gun to tell this but just from what I see - it hasn't been properly cleaned and/or lubricated yet. New guns need cleaning and proper lubrication MORE than seasoned, properly broken-in firearms.

Lube - rotating parts get oil, sliding friction parts get quality grease.

Let us know how it goes after it's cleaned and lubed, and shot on the range.

Thank for stopping in for a visit. Stick around - there are at least two great members here - that would be you and me... The rest - well, the jury is still out...

Welcome from Wisconsin and congrats on the P938.
+1 to Steve's post. It is important to make sure that grease is used on sliding parts. A proper field strip at home and lubing before going to the range is important.
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Old 01-11-2017, 10:52 AM   #15
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Update: I went through about 50 rounds last night and it worked relatively well. I had one jam on the first round of a magazine, but that was my own error.

I'll be getting some more out of it within the next week.

Thanks for the help guys.
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