Trigger not resetting

[deadhead1971]

A friend of mine is having a trigger reset issue on his PM9. I told him to come join us.

He has posted a video which shows the malfunction.

http://www.youtube.com/watch?v=QMpHm7cWypM

PM9 range session starts at around 2 1/2 minutes. What's yalls take on this? I have heard of magazine issues (jams, ftf, slide stop causing slide locking back early) but I have not heard of a mag causing a trigger issue.

[CJB]

I disagree with his analysis which concludes "its the magazine" causing trigger reset issues. The film clip is non conclusive as well.

However, there may be a cartridge rise issue - leaving the chamber empty. Thats not trigger reset.

More info... please, sir.

[RogerP9fan]

I'm glad to see in his case it just happened with the extended magazine. But when you stop to think about it, how could a magazine cause the trigger to not reset? And this isn't the separate issue of failing to return to battery as we could see the slide was all the way forward.
This is the same problem i had last year with my P9 although in my case, it would happen at random with any magazine however, the trigger failed to reset only when I fired in a 7+1 configuration. When I put a full magazine in, chambered a round and started shooting.....no problem.......only when I topped it off to 7+1 in the pipe.the trigger would fail to reset randomly.

[RogerP9fan]

I disagree with his analysis which concludes "its the magazine" causing trigger reset issues. The film clip is non conclusive as well.

However, there may be a cartridge rise issue - leaving the chamber empty. Thats not trigger reset.

More info... please, sir.Interesting...what is "cartridge rise problem"? Last year Kahr replaced my trigger bar but still had "trigger failing to reset" when going with the 7+1 in the pipe.

[TucsonMTB]

Hey DeadHead. You have probably noticed that extended mags have been a problem for many people. If their poor feeding leads to a failure to return to battery, the trigger will not reset. Not being a 9mm guy, I should probably pass, but my PM40 is probably close enough and I wanted to make another comment, so . . .

My PM40 is finally reliable with all magazines, including the extend mag. Your friend doesn't mention if any break-in rounds have been fired. My theory is that some Kahr breach faces are less smooth than optimal. They may "polish in" during the break-in, resulting in a reliable pistol. Admittedly, mine did not. But, after polishing the breach face and more than 500 rounds, mine now works well. This usually leads Jocko to suggest that you shoot it like you stole it and expect it to improve. He could do that with the flush fit mags and test the extended mag once the pistol is broken in.

One last comment: If you know this gentleman well enough to offer advice, you might tell him that frequently dropping the slide on his Kimber, without a loaded magazine in place to feed a round (thus cushioning the closing impact), is generally regarded as likely to cause problems. It's not a Kimber thing, just a feature of the 1911 design. He may get away with it for a long time, or he may damage his extractor the next time he does it. Hard to say, but most 1911 "experts" suggest not doing it.

I should hasten to add that I am not an expert, but I do follow their advice in this area, mostly because damaging a good running 1911 would be a disappointment, not because of any personal experience. YMMV or maybe that should be HMMV. ;)

Pointing him to the forum sounds like a great idea!

[CJB]

Interesting...what is "cartridge rise problem"? Last year Kahr replaced my trigger bar but still had "trigger failing to reset" when going with the 7+1 in the pipe.

That would be the pistol firing, the slide cycling, but the cartridge being late or slow moving up, and this missing being chambered.

The seven round magazine... I can see no mechanical way for the magazine to make the trigger not reset. Maybe... slight chance, that the slide is being held open slightly when the seven round is in place, but that is a stretch of improbability becoming reality. I'd suspect rubbing on the magazine holding the slight back - just a little.

Have your buddy shot each shot, but tap the slide forward between shots (remember, finger off the trigger please). Do that with the seven round mag, and it should confirm or disprove a "going fully into battery" problem.

The video doesn't really show whats going on. There is one semi flinch, but then he pulls the trigger and it fires. Maybe that was just a muscle thing, trying to get used to the gun. Speaking of which - how many rounds through it?

[CJB]

I've looked at that clip several times. There's an apparent trigger pull, flinch, visual check, then trigger pull, and it fires. What was that all about? Then on round 4, there is a .. reset problem?

Again, I cant see how that is magazine related, although other magazine related issues happen with those 7 round mags (as reported here)

[Rainman48314]

A friend of mine is having a trigger reset issue on his PM9. I told him to come join us.

He has posted a video which shows the malfunction.

http://www.youtube.com/watch?v=QMpHm7cWypM

PM9 range session starts at around 2 1/2 minutes. What's yalls take on this? I have heard of magazine issues (jams, ftf, slide stop causing slide locking back early) but I have not heard of a mag causing a trigger issue.I had a brief trigger not resetting issue with a Ruger SR9c and an even briefer one with a Sig P238. Both occured in the first 100 rounds and both were resolved with a very thorough use of Gun Scrubber followed by heavy oiling, "draining" and wipedown.

[ripley16]

I agree. A good, thorough cleaning may be the answer. After 700 rounds, especially using the very dirty Federal ammo, could lead to gunk along the trigger bar and that can cause it not to move freely and reset the trigger.

The gentleman has an interesting way of loading from slide lock. I've never seen anyone load a pistol that way. I noticed he had no problem using the slingshot method on his PM9.

[jocko]

well that would be my first remedy to fix the issue. CLEAN AND RELUBE. Magazine has nadda to do with his issues. He might have an out of spec trigger bar jor maybe time for a recoil spring change also. gotta start somewhere, #1 clean and lube. #2 new recoil springs, #3 test fire#4 if this all fails give kahr a call and ask for a pickup.

[deadhead1971]

Thanks. I am reading your comments. I think he told me he has about 700 rounds through ther PM9.

[MrColionNoir]

I disagree with his analysis which concludes "its the magazine" causing trigger reset issues. The film clip is non conclusive as well.

However, there may be a cartridge rise issue - leaving the chamber empty. Thats not trigger reset.

More info... please, sir.

I fired the first round let the trigger out the entire distance to reset but to no avail. I pulled the trigger again, though it had not reset and let it out and then it reset itself allowing me to fire.

I wasn't sure what was going on and it caught me by surprise because I have not had any issues with my PM9. My flush plate ran perfectly. I only had the issue when the extended mag was in place so it led me to believe it was an issues resulting from the extended mag being used.

The gun wasn't pristine, but it was not filthy either. I cleaned and lubed the gun this weekend and will take it back out and run 100 rounds using the extended mag and see what happens.

I carry this gun the most so it freaked me out a little bit. I love my PM9, though I am considering moving to the PM40. If I did it would be based purely on the psychological comfort I derive from having a bigger caliber. (SMH....Texas State of Mind)

Hope this helps.

[MrColionNoir]

One last comment: If you know this gentleman well enough to offer advice, you might tell him that frequently dropping the slide on his Kimber, without a loaded magazine in place to feed a round (thus cushioning the closing impact), is generally regarded as likely to cause problems. It's not a Kimber thing, just a feature of the 1911 design. He may get away with it for a long time, or he may damage his extractor the next time he does it. Hard to say, but most 1911 "experts" suggest not doing it.


Pointing him to the forum sounds like a great idea!

Thanks for the advice, would hate for anything to happen to my raptor.