M&P9FS Jammed up & FTFs today at range???

[McBear]

My apologies that this has been covered several times. I read through the various threads via search and still find I don't have a clear answer. Here was today's range experience.

M&P9FS [new 2/29/12] 300-400 rounds
Ammo:first-second mags were unknown FMJ ammo from a decade ago. Third-fifth were TulAmmo FMJ.

First 17 rd mag blew through perfect. Even happy with first 15 yd group. Halfway through SECOND MAG I got CLICK. I manually ejected this round and got CLICK. Manual ejected and got CLICK. I released mag, cleared pipe and inspected for dirt/gunk/aliens/bent metal. Nothing visible. Slid mag back in, chambered round. BANG. Repeat for 5rd. then CLICK, manual eject, CLICK --- JAM. Pistol bound up, unable to slide back to eject round. Flagged RSO who finally got it opened and removed round with Leatherman [Fat round]. Advised to try other mags. 10 rds clean then CLICK. Then 5 rounds clean. Next mag only one CLICK then JAM UP again.

Good news...I have gained patience. Unlike my StarTek phone of 1999 which went across 6 lanes of Times Square traffic...I simply called RSO who unbound it again. M&P9FS went into the bag.

Beretta92FS Inox blew through six mags of the same ammo combo with tight groups and zero failures.

M&P45FS blew through five mags of TulAmmo with VERY nice groups and zero failures. First 15 yd target I have actually brought home.

All guns cleaned. Nothing that I can see is showing up bad on the 9. Even the TulAmmo is not leaving bad dirt.

Any suggestions as to what is causing CLICK and LOCKUP? They have made this weapon go into the safe until this is solved.

EDIT: I will be getting a couple of boxes of good ammo tomorrow to run through the 9 on Monday to see if I can remove the variable of ammo from the mix.

 

[PC Geek Shooter]

You could have a bad striker trigger spring. I'd call up S&W and if that is the problem, have S&W send you one for free if possible.

Or you could try this from SSS M&P 9/40/357 Extra Power Striker Spring

 

[McBear]

Thanks for the reply. I just got home from a biz trip and I am heading back to the range with new ammo today to see if I still have the issue. I am beginning to narrow it down to something in the firing pin since I got no strike on the FTFs or that the slide did not completely return prior to fire.

I should know within an hour.

I was waiting for more response here. I got 150 views in two days with only the one response. Maybe if I had said it was a Shield.

 

[Twoboxer]

Hard to suggest something when nothing in my experience with my own M&P9FS compares. Didn't think you wanted to hear about 1500 rounds fired with the only glitch being the failure of the slide to lock open on empty at round# 95 lol.

But I'm not using anything but fresh, cheap American Eagle or Blazer 115gr FMJ.

 

[accessbob]

I'm no expert, by any means, but from some of the conversations I've heard in other situations this situation sounds like the trigger isn't being reset properly (which is probably why PC Geek Shooter suggested what they did). But again, this is only some very low-educated guessing on my part. But I would like to know the outcome because we had that issue on a Sigma 9F that I used to have.

 

[McBear]

Well, I blew through two boxes of American Eagle 115 FMJ with absolutely no problems. Went through the first mag very quick to heat everything up and the rest at a normal pace. That leads me to believe the mystery box of old ammo might be the issue. I only have 100 of those left so they may just go into the Beretta only as it seems to eat anything.

The potential culprits seemed to narrow to:

• bad ammo
• firing pin gunked or not functioning properly
• extractor issue
• slide failing to fully go forward with new round.

At this point, I have either cleaned the problem away or it was the ammo or the problem is "resting". Only good ammo through this guy for a while, then we might try something else.

 

[SSW1911]

Many possibilities. I haven't had this issue with mine, so I don't have an answer.

For me anyways, I would call S&W they can email you a prepaid shipping label and let them sort through everything, find the causeand make sure the FTF, FTE haven't caused any collateral damage.

I had some issues with FTF and FTE on my S&W 1911ss. Called S&W it went back and they made three different fixes. I had it back in less than 3 weeks and the gun runs flawless now.

Just my 2 cents.

Edit my 1911 was 8 months old and cost me nothing. They covered shipping and all parts and repairs.

 

[McBear]

Many possibilities. I haven't had this issue with mine, so I don't have an answer.

For me anyways, I would call S&W they can email you a prepaid shipping label and let them sort through everything, find the causeand make sure the FTF, FTE haven't caused any collateral damage.

I had some issues with FTF and FTE on my S&W 1911ss. Called S&W it went back and they made three different fixes. I had it back in less than 3 weeks and the gun runs flawless now.

Just my 2 cents.

Edit my 1911 was 8 months old and cost me nothing. They covered shipping and all parts and repairs.

I sent an email with pretty much same details as my OP here with a bit of extra detail Friday night. I got a response today [while sitting on an airplane waiting to taxi] and have been exchanging email with them since. Consensus was, if the new ammo worked, sit on it for a week or so and see if it comes back, if so send it in. So I will blow a few hundred good rounds through then switch to the original rounds that I shot on Friday. If the problem comes back...problem solved. If it comes up on the good ammo...it goes to Mass for a nice spa vacation.

 

[handgunner356]

Try removng your barrel and see if the ammo is dropping down in the chamber all the way. It sounds like the rounds are getting stuck not allowing the gun to go fully into battery, and then requiring extra effort to extract. I would not be surprised if you have a slightly tight chamber that just doesn't like the TulAmmo in that gun.

 

[McBear]

Try removng your barrel and see if the ammo is dropping down in the chamber all the way. It sounds like the rounds are getting stuck not allowing the gun to go fully into battery, and then requiring extra effort to extract. I would not be surprised if you have a slightly tight chamber that just doesn't like the TulAmmo in that gun.

Good thought...I will put all the different ammos on the bench tonight and see what doesn't play well. We did have two rounds that seemed "fat" from the old batch. They have been destroyed at the range.

Update once I wander down stairs.