M&P 22LR Full magazine feed issue

drmweaver2 · Aug 26, 2016

Was at the range today and had a repeated issue with the top round in the magazine not feeding more than halfway into the chamber. Actually, it's probably closer to not being more than halfway stripped off the magazine... Okay, those are close to the same thing... Both seem to describe what was happening.

Another symptom, or maybe not, I hadn't REALLY looked closely at this before, there was 1/32 inch or so silver/gray line on the lower firing block (or whatever it's called) where the bullets were rubbing they fed into the chamber.

There are 2 different "lines"... I never noticed either before, but then I was really looking (shame on me).

This happened with both some Remington Golden Bullets and some Federal Target Match ammo. So, I don't think it was the ammo itself.

Yes, I usually have trouble with GB's but not like this. It's usually failure to eject, not failure to feed. No, I haven't had issues with the Federal ammo before... none at all.

I didn't try a third type of ammo as both didn't have any and I was getting frustrated with the frequency of occurence.

Any ideas?

drmweaver2 · Aug 27, 2016

No ideas, eh?

OKFC05 · Aug 27, 2016

Well, reluctantly without seeing the gun, here's probably what I'd do if I had this M&P .22 in my hands.
1. Dissassemble, clean, DEBURR, dry, and reassemble the magazines. I use CRC silicone, which leaves them slick after I wipe them thoroughly. I stone magazine lips glass smooth.
2. I learned the M&P .22 likes a little extra lube on the back of the slide. Grease the shiny spots. Always CLEAN before adding lube.
3. Instruct the shooter to slingshot the slide when loading the first round, pulling the slide back until the fingers slip off the slide. Never touch the slide when it is closing.

Hope this helps.

drmweaver2 · Aug 27, 2016

OKFC05 said:
1. Dissassemble, clean, DEBURR, dry, and reassemble the magazines. I use CRC silicone, which leaves them slick after I wipe them thoroughly. I stone magazine lips glass smooth.
2. I learned the M&P .22 likes a little extra lube on the back of the slide. Grease the shiny spots. Always CLEAN before adding lube.

#1 was done last night as far as my skill level goes.
Question about #2 though.... Grease? Not oil? The manual doesn't mention grease as far as I remember.

OKFC05 · Aug 27, 2016

drmweaver2 said:
#1 was done last night as far as my skill level goes.
Question about #2 though.... Grease? Not oil? The manual doesn't mention grease as far as I remember.

I use Brownells gun grease where it slides, remoil where it turns and in linkage, just based on lots of experience. Like I said, look for the shiny spots, that's where the friction points are.

P.S. When putting on grease, just leave enough of a film that you can see a mark from a fingernail. More does not help.

garyez · Aug 27, 2016

Have the same wear marks on the "lower firing block" and in a lower part of the mag well on my full size M&P 22 which seem to be normal wear from just inserting and dropping the mag. Think that I have about 1k rounds fired through my M&P.

Couple of suggestions: check to make sure the first round is still firmly held in the mag after it's inserted, don't use the slide release to load the first round, check the breech and ejector for any signs of damage, check the feed ramp for defects. From the picture it looks like the feed ramp is normal but often things are different in real life.

drmweaver2 · Aug 28, 2016

garyez said:
Have the same wear marks on the "lower firing block" and in a lower part of the mag well on my full size M&P 22 which seem to be normal wear from just inserting and dropping the mag. Think that I have about 1k rounds fired through my M&P.

Couple of suggestions: check to make sure the first round is still firmly held in the mag after it's inserted, don't use the slide release to load the first round, check the breech and ejector for any signs of damage, check the feed ramp for defects. From the picture it looks like the feed ramp is normal but often things are different in real life.

I've got about 2600 rounds through the pistol now. I appreciate the wear comments you made for comparison.

I normally don't use the slide release button but do a manual "slide rack" to load the first round. I became "concerned" when some rounds weren't feeding even halfway into the chamber. At first, I blamed the cheap & dirty Remington Golden Bullets but this also happened with Federal bullets.

I don't see any damage or wear (other than the marks I mentioned in the original post) anywhere on the feed ramp, top of the magazine seating area, top of the slide, or the firing chamber end of the barrel itself (breech?).

FWIW, I've never dropped any of my mags. As OKFC suggested, I've checked all of my mags for burrs, roughness and obstructions/damage... nothing seems to be wrong with any of the mags. And this happened across multiple mags. I'm probably going to pick up some of that CRC Silicone stuff he mentioned, but won't get to do that until Monday. I'm assuming he means the stuff in a spray can.

I'm going to grease the slide as OKFC suggested and take it out again on Monday. Fingers crossed.

drmweaver2 · Aug 29, 2016

OKFC05 said:
I use Brownells gun grease where it slides, remoil where it turns and in linkage, just based on lots of experience. Like I said, look for the shiny spots, that's where the friction points are.

Well, I used some SNO Universal gun grease that I found at Academy Sports. Put it on just before heading tot he range. It worked fine. Guess that's gonna be the way to go for me from now on.
Thanks.

M&P 22LR Full magazine feed issue

drmweaver2

Member

drmweaver2

Member

OKFC05

Member

drmweaver2

Member

OKFC05

Member

garyez

Member

drmweaver2

Member

drmweaver2

Member

Similar threads

Latest posts