M&P9 - Slide Jammed - Guide Rod Protruding At Muzzle

Eric300 · Apr 8, 2022

gnystrom said:
I get this a few times per month at our range. Make and model doesn't seem to make a difference.
My solution, while wearing a pair of gloves and gun always pointed downrange,
Overhand strong grip on slide,
Strong blow to grip with gloved other hand.

Very few people know this technique to unlock a locked-up semi-auto pistol. Good for you! Just make sure you are gripping the slide tightly and smack it as hard as you can high on the back-strap and drive through the gun. Sometimes it might take 2 or three blows but it will clear.

hardluk1 · May 30, 2025

Tu_S said:
Have had it happen to me in my M&P 45. The safety officer had a bracket that you could put the pistol in and push on to clear the problem, but the bullets got left behind when we got the slide to move.

Was shooting 230gn LRN that was loaded to an admittedly long but still in spec 1.26 COL, over 4.2gn of 700-x, a light target load that I have been using in my 1911's with no problems for around 30 years.

After 2 rounds got stuck I took the rest home to measure and test in the barrel, where they all worked fine. Not sure if it was just 2 mistakes on my part or something else.

Do you use a Cartridge Guage to few reloads before any bulk runs in reloaded ammo ? If not you need to invest in one or a few of them to be sure dies are adjusted properly or even up to the task I used . I have used Hornady and lyman single cartridge gauge's for years but you may find a egw 4 cartridge gauges works well and save you some money and covers 4 size cartridges . Ammo should drop in an out and set flush with the of the gauge .

AlHunt · May 31, 2025

hardluk1 said:
Do you use a Cartridge Guage to few reloads before any bulk runs in reloaded ammo ? If not you need to invest in one or a few of them to be sure dies are adjusted properly or even up to the task I used . I have used Hornady and lyman single cartridge gauge's for years but you may find a egw 4 cartridge gauges works well and save you some money and covers 4 size cartridges . Ammo should drop in an out and set flush with the of the gauge

I'll disagree almost completely here, having been through this. I took up 45acp a few years back and got my first ever cartridge gauge, after +50 years of reloading.

Your chamber is not going to be identical to your cartridge gauge and in particular your throat. My problem was no leade in the rifiling and my powder coated bullets would sometimes be just thick enough to engage the rifiling.

Use the barrel of the gun you're going to shoot them in as a cartridge gauge.

hardluk1 · Jun 1, 2025

AlHunt said:
I'll disagree almost completely here, having been through this. I took up 45acp a few years back and got my first ever cartridge gauge, after +50 years of reloading.

Your chamber is not going to be identical to your cartridge gauge and in particular your throat. My problem was no leade in the rifiling and my powder coated bullets would sometimes be just thick enough to engage the rifiling.

Use the barrel of the gun you're going to shoot them in as a cartridge gauge.

I mentioned that combine plunk testing a few rounds form any new lot number of ammo or different brand is a good idea . Its just a good why to check when your running a new batch of home rolled loads, if ammo does not pass a cartridge gauge you may find it will not chamber in some barrels are handguns . If you feel my advise to OTHERS was not needed by you it's not like I care but other might find it useful ?

I started reloading ammo back '76 so big deal on how long you have reloading ammo too !! At one point I reloaded practice for oiur family covering 7 different cartridges so I checked ammo occasionally as I do not have 7 reloading machines !!

I was not giving YOU advise and could care less if you found my reply worthless as it was not directed to you .

decuerno · Jun 1, 2025

Another reassuring reason I never shoot anyone’s re-loads but my own.

@hardluk1 and @AlHunt : I’ll (respectfully) disagree with both of you guys. Using an actual firearm chamber as a gauge to proof ammo …while likely safe for that particular ammo/gun combo…. will NOT supplant a genuine tool-gauge to proof ammo which may find it’s way into a similar but not identical firearm.

Handloading Tip: have you ever wondered why cartridge holders have hollow centers? Yes, it facilitates de-priming fired-ammo… but it also allows re-sizing of improperly-sized assembled ammo.
Cartridges which were only neck-re-sized will not reliably chamber in any firearm other than that which last discharged that cartridge-case. Assembling ammo (such as with a Lee Loader) without fully re-sizing ammo can result in ammo which will not chamber different firearms without resizing. It’s hazardous to re-size assembled ammo, but it can be done as long as a hollow shell-holder is used.

AlHunt · Jun 1, 2025

Here's the thing about cartridge gauges - they're supposedly made to SAMMI spec. But tolerances vary, machines and cutters wear. Same goes for gun makers. Plus following SAMMI spec isn't a law, just something most (maybe all) manufacturers agree to follow.

Every situation is unique and everyone is free to follow any practices they wish.

@hardluk1 - I hope your day gets better, bud.

hardluk1 · Jun 1, 2025

Yep, every situation can be unique and everyone is free to follow any practices they wish. But a good cartridge gauge is better than nothing att times to check ammo on occasions but some just don't seem to care.

Seems more like your days not so good to start and argument that you were not part of to begin with . Seems like your the one that needs better days in your future . And we another expert above !!

You guys can do what ever you want to when you start a new load .Not like I care what the few whine alots do .

Tu_S · Jun 2, 2025

hardluk1 said:
Do you use a Cartridge Guage to few reloads before any bulk runs in reloaded ammo ?...

Have two of them for 45ACP, a Lyman block with multiple calibers and a Hornady one.

M&P9 - Slide Jammed - Guide Rod Protruding At Muzzle

Eric300

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hardluk1

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AlHunt

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decuerno

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AlHunt

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hardluk1

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Tu_S

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