Picked up a 4.6 model 10mm for a woods gun and bear defense. Fired a bunch of Blazer through it with no issues. Went to try the Buffalo Bore outdoorsmen and it wont even feed a single round without helping it slide into chamber. Single shot doesn't work very good for defense. Very disappointed. Anyone else have this issue?

I’ve got the 4.6” also, but I haven’t put any factory ammo through it. Check the dimensions between the blazer and bb with a caliper. Is the O.A.L. greater in the bb? Possibly engaging the rifling before it goes completely into battery. Mine has been running great with 180 grain flat point Berry’s plated over 10 to 10.3 grains blue dot with a O.A.L. of 1.260”. I’ve got over 1200 rounds through it now. Only bullet it didn’t like was some lead SWC’s I loaded for my 610 and tried through it to see how they worked.

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USS Brewton FF1086
SWCA#3597

Is it the 200 grain?

220 gr hardcast

Personally, I would 1st contact the manufacturer...?

Cheers!

Joined just to complain.
I wonder if this person is really interested or is just a bot?

Not a bot and not complaining. I actually really like the gun so far. Just bought the gun for a woods gun and the BB doesn't seem to work in it. Lookig for suggestions on maybe a different ammo that people have tried and works or if someone has had similar problem. Maybe ammo or maybe just this particular gun.

Can you help or just complain?

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I’m your Boogie Man, uh huh.

If I've read this correctly you're talking about either plated or FMJ's that would cycle. THE BB is a hard cast lead & perhaps that or its contour is the source of the issue.
Pull the barrel & try to slip one in by gravity alone. FWIW

I believe you are right. If you line the round up it slides in but the angle the magazine pushes the round up with it seems the bullet shape gets caught on the upper part of the barrel. Wondering if just getting more rounds through it would break it in and allow for smoother action.

That sounds like a FTF and not a failure to return to battery. Post a picture of the bb round next to a blazer round that feeds normally. From your OP, it sounded like the bullet was square in the chamber, but the slide stayed slightly out of battery due to the bullet contacting the lands of the rifling.

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USS Brewton FF1086
SWCA#3597

Man, that's disappointing to hear -- yet another 10mm M&P that can't handle serious 10mm ammo. Please let S&W know about the problem. Sooner or later, they'll have to stop gaslighting their customers and admit that their 10mm M&P line, as it stands now, falls short.

Here are pics of the rounds and the failure

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I load 165 grain RNFP poly coated bullets COL 1.260 have no issues, same with HP's from 135 to 180 grain.. I have some 200 grain black talons will see if they cycle ok.. Total rounds is 600 trouble free same gun 4.6.. Take a look at the COL if they are longer than 1.260 that could be an issue.

I am currently being stonewalled by Smith and Wesson (no response to my emails), but one way or the other my 10mm is going back to them for the second time. I am experiencing a 7.5% fail to feed rate, which is totally unacceptable.

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Those are ugly looking jams.

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Release the Kraken

My limited experience with Magtech is that their OAL's seem to run long.
This is a critical dimension, as casings can have trouble getting into proper position up and under the extractor as the slide is moving forward.
The profile and tension of the extractor is also critical as the casings can get trapped at the top of the feed ramp as they come into contact at the top of the chamber. (stem bind)

Can those of you having feeding issues measure/report the OAL of the problematic unfired rounds? Also, see if ammo that conforms to the max OAL of 1.250" functions more reliably, and if empty casings will feed out of the magazine into the chamber. The empty casing trick may give you an idea of whether or not the extractor is properly clearanced and tensioned.

Also, check the empty casings closely around the rim for evidence of damage or binding caused by the bottom of the ejector claw.

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Ret. LE, FA Instr, S&W Armorer

FWIW, I was having a 1-2% FTF, FTE, stovepipe, etc. until I hit about 750 to 800 rounds down range. I think mine was mainly ammo related though; there were some lead rounds, especially SWC’s that it just didn’t like. Once I got past 800 and have been using 180 gr. plated flat nose, it’s been smooth sailing. I just put 180 through it yesterday afternoon and another 180 this morning (now that I have 12 mags), and it’s been running like a Singer sewing machine. Of those 360 rounds, I did about 240 and my daughter did about 120 without a hiccup. My total round count is closing in on 1500, so maybe there is an extended break in period that someone just relying on factory fodder would take a while to get to.

I take a couple of extra measures to help reliability also. For one, I clean after about 250-300 rounds and slick it up pretty well with moly grease. I used a garnet scotchbrite pad and slightly polished the feedramp. When I say slightly polished, I worked on it for about 15 minutes, but the fairly mild abrasive on the scotchbrite removes little material. There were some noticeable machine marks on the ramp and the scotchbrite smoothed out the high spots. I’m not an advocate of aggressively polishing feed ramps, except as a last resort. When I finished, I rubbed some moly grease on the ramp, working it in for a couple minutes, then wiping it off. I don’t know if that last part helped, but it does seem slicker. Lastly, I just finished up loading about 1200 rounds with the 180 grain Berry’s plated flat points over 10.0 grains of Bluedot. This seems to be the sweet spot for my pistol. When I finished, I ran them through some corn cob media with Nu-finish in a dry tumbler in 100 round batches. This smooths out imperfections and makes the cases and bullet tips slick and waxy. A few extra steps, but it didn’t take that much extra time.

Notice in my first picture the machine marks on the ramp? Still noticeable, but before I ran a scotchbrite pad over them, you could feel them with a fingernail. Does everyone’s ramps look like this? Not sure if it’s part of the design…maybe I redesigned it

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USS Brewton FF1086
SWCA#3597

The profile of the BB rounds looks just different enough that it could create a problem. Some pistols need a good number of rounds down range to feed right, so it could be a combination of the (lack of) rounds down range and the profile.

One answer, which you might not like, is do what Bill Allard did with his 1911 in the NYPD stakeout squad days according one of the books by Jim Cirillo - load and chamber the first round specifically, and then use something more likely to feed in the magazine.

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NHI, 10-8.

Thanks for the comments.

In shooting just south of 500 rounds through my 10mm, I believe I have tried 9 different different types of factory ammunition using 180-200 gr. FMJs, JHPs and Underwood Hard Cast bullets-All to no avail in producing reasonable reliability.

I have tried different stances and grip techniques-Again to no avail… But then again, I don’t claim to be a pistolero.

I am really confident that fouling and lubrication are not playing any role in this failure to feed issue with my firearm.

I have noted in my internet research regarding the MP 2 10mm failure to feed issue that the majority of the troubled pistols are the compact version(4”barrel). That is what my dog is…

I second this emotion.

Apologies for the digression, but is there a policy against non-helpful, non-germane comments?

If so, Mods, if you're listening, could we enhance the policing of these?

If not, Admins, if you're listening, would you consider adding such a policy?

I just measured 5 different load weights from 135 to 200 grain, RNFP to hollow points. The longest cartridge overall length (COL) was 1.258 the shortest 1.255. All work with no FTF in my 4.6. Have you tried different magazines ?? Possible weak mag spring?

Just last year I had some properly stored .32 acp of theirs that would not fire at all. Contacted them and Tim Sundles just told me to pound sand. Claiming his ammo was the best in the world.

More recently just the other day I had some of their heavy outdoorsman 180 grain .357 magnum ammo that would not fire out of my S&W model 686.
Not going to bother contacting BB as they think that their ammo is beyond reproach.

What are you talking about? Which thread or post are you referring to?

So far this thread has not discussed a failure shooting serious ammo, just a failure with a specific Buffalo Bore offering.

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"Acta non verba"

On the rounds that failed to chamber, are there any marks on the lead projectile?

If so, did you pay attention to the orientation when the round was removed?

That wide Meplat may be contacting the chamber wall and slowing things down.

Do you have access to any other manufacturers 220 grain ammunition, perhaps with a different nose profile, that you can try?

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"Acta non verba"

Problem with M&P 10mm + Customer Service Nightmare

Thanks for your input. You’ve been so helpful throughout all of the M&P 10mm discussions

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USS Brewton FF1086
SWCA#3597

I don't have a dog in this fight, but I have noticed a few strings about freeway stoppages with the 10mm M&P, and it seems to me that a common factor is heavier weight/hotter loads. While that is not a useful diagnostic commentary for the OP, there is a very real possibility that there is a broad spectrum/systemic issue. That is of value for awareness if wants a 10MM M&P to use with such ammo.

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NHI, 10-8.