I have been toying with getting one of the 10mm M&Ps since they came out. A few weeks ago a did a Google search on M&P 10mm problems, and there lots of reports of the feeding issues that you described. I don't think that it is an problem with the ammo, as it's been happening with different ammo manufacturers.

Looks like I will have to pass on getting a 10mm M&P

I've been looking at a Ruger GP100 Match Champion in 10mm. For no good reason at all. lol

quote:

Originally posted by smithbc:
I have been toying with getting one of the 10mm M&Ps since they came out. A few weeks ago a did a Google search on M&P 10mm problems, and there lots of reports of the feeding issues that you described. I don't think that it is an problem with the ammo, as it's been happening with different ammo manufacturers.

Looks like I will have to pass on getting a 10mm M&P

Seems like the M&P 10mms are having teething issues.

I expect Smith will sort the gun out over time and eventually make it work but it just reinforces my view that it's best to not to be an early adopter when new firearms are released.

My 10MM M&P works just fine and I am happy.

Mine has had around 1000 or more rounds through it so far. At least half have been my full power hand loads. That includes my 180 grain FMJ and JHPs along with my 220 grain FMJs and my 240 grain JHPs. Admittedly we keep the 240 JHPs subsonic for the suppressors, so it might not be considered "Full Power"

The remainder has been ammunition from the major manufacturers like Winchester, Federal, Speer and Hornady with some of it coming from small ammunition manufacturers like SIG, Browning and Nosler

The Smith & Wesson Factory has shipped many thousands of these pistols, probably more like tens of thousands by now. Most of those pistols have no problems, though I have seen reports of a dozen or so with issues. A large portion of these are being mentioned as ammunition problems and the name Underwood has reappeared more than once.

I myself do not shoot any ammunition from the really small manufacturers that like to load right up to the bleeding edge of SAAMI specifications or sometimes beyond.

I admit to never having fired a round of Underwood ammunition and it is going to stay that way. However, I have fired many rounds of SAAMI spec ammunition through my firearms including my firearms chambered for the 10MM Auto.

I have seen someone post that a new gun from a Major manufacturer should just work.

I have also seen posts where the writer comments that SAAMI specifications does not constitute true 10MM Auto ammunition power. I think that is unfair. We have an organization like SAAMI so that there can be established norms

Is it fair to only judge a firearm from a 160+ year old manufacturing company by the ammunition of one small manufacturer that has only been around a few decades? I have not seen a report that these pistols have failed to function with ALL brands and styles of ammunition hey have been fed

If someone's goal is to only shoot Underwood ammunition in their pistol, that is fine. But just because it has trouble with Underwood does not mean the firearm is inherently flawed.

While not all of the complaints are being heard about Underwood ammunition, the other trend among the reports appears to be flat tip or flat point ammunition.

Then there were a few reports of magazines dropping

It is pretty easy to make a single shot or a revolver that will function across a broad spectrum of power with a wide range of projectile shapes. When it comes to a semi-auto or a SMG that is utilizing the recoil forces to eject, strip off and reload the firearm's chamber it turns out to be a more complex issue.

No manufacturer is going to make 100% perfect products 100% of the time. If you think that the dozen or so problems that are being reported on multiple Internet sites is too much, then I understand your desire to move on to a different product.

I know none of us wants to get the lemon, but there has to be a margin of flaws that we consider simply to be manufacturing issues. Are there any of us that expect our cars to be 100% perfect when we drive them off the lot?

Myself, I have not experienced or read anything that bothers me about the Smith & Wesson 10MM M&P so I am going to keep mine

I promise to not try and make you like a product I am happy with, I just ask that you not try to make me dislike a product that you have lost faith in

Hm. Underwood is generally the ammo of choice for bear protection. It's what I rely on, whether it's with a semi-auto 10mm or a .357MAG revolver. I've yet to encounter any problems shooting hard cast 200gr or 220gr Underwood out of my G20. Underwood clearly states that their 10mm loads do follow SAAMI specifications.

I've encountered a couple of issues with Buffalo Bore not feeding correctly in my Glock, though it may have been a bad production batch and not something common to the brand, but I can't say for certain given only a small sampling of two 20rd boxes. But both Doubletap and Underwood have to date functioned with my G20 without encountering any problems, and with other G20s and G29s that I know of (and some shot) personally.

From the first time I handled the S&W M&P 10mm pistols that had come through the shop, I've wondered how well its slide would hold up to stout 10mm loads. That slide design seems awfully light to me when it comes down to its build (it's more like one of their M&P 9mm or 40S&W slides in that regard). Definitely seems light when compared to the Glock, P220 10mm, XDM 10mm and now the P320 X-TEN. Shooting a weak range load like S&B 180gr 10mm wouldn't be an issue but with any decent bear load (perhaps besides HSM) I think that I'd be hesitant to use any of that stuff through one of those.

 
I own the SIG P220 Stainless Elite 10mm, SAO, with the Nitron finish. It handles Underwood 180gr Gold Dots like a dream, and it is one of the most accurate pistols I have ever shot. Using SIG magazines, I have never experienced a malfunction with any ammo, Underwood or lesser. I also handloaded some 200gr (Precision Delta FMJ) down in power a bit, for practice and competition, and no problem there, either.

for what it is worth,
these kinds of concerns, even now late 2022,
make Glocks 10mm (G20/29/40) more attractive.

I know folks suggest to just install heavier
recoil spring on the M&P 10mm, but in my view,
the larger issue is -- that it does not look like SW tested their design with full house 10mm loads.

What else can go wrong in 5-10 years with M&P 10mm? Will the frame, the optics mount, the pins -- hold up to the round?

With the Glocks, the service history is on their side.
And it is especially important for the centimeter caliber.

It's back from Smith & Wesson. No explanation, invoice only states, "Replaced Barrel". The feed ramp does appear to be more polished than the original. Hoping to get out to the range this weekend to try it out. I'm also thankful to have it back after numerous e-mails from FedEx with warnings of adult signature and ID required, they just left it on my front door step.

I've been doing quite a bit of research online. Seems the second to last round in the magazine failing to feed is a common problem. One fix has been stronger recoil springs. Lots of kitchen table gunsmithing of taking apart the the recoil spring assembly and reassembling with a heavier Glock spring. Galloway Precision now has heavier recoil spring assemblies available for the 4". The other fix has been to replace the magazine springs with Springer Precision or using the extra power Wolff springs from the .45ACP M&P magazines.

Hoping it functions, I really want to like the gun.

I picked up a M&P 10mm yesterday, the 4-inch model. Watching this thread closely.
My hope is to put some rounds through it this weekend.

Range update.

Took the new M&P 10mm with 4” barrel to the range yesterday. Fired about 75 rounds, no hangups at all. The gun performed flawlessly.
Ammo included S&B 180 grain FMJ (mild), Sig V Crown 200 grain (semi-spicy), and Underwood 200 grain hard-cast (very spicy).

I really like 10mm, now.

quote:

Originally posted by VictimNoMore:
Range update.

Took the new M&P 10mm with 4” barrel to the range yesterday. Fired about 75 rounds, no hangups at all. The gun performed flawlessly.
Ammo included S&B 180 grain FMJ (mild), Sig V Crown 200 grain (semi-spicy), and Underwood 200 grain hard-cast (very spicy).

I really like 10mm, now.

That is great to hear that it functioned with a variety of loads including the spicy stuff.

Perhaps Smith is quietly correcting issues seen with the earliest guns???

10mm has been more available on the shelf locally than 357Sig, has me 10mm curious, never fired one.

quote:

Originally posted by Jimmo952:

Perhaps Smith is quietly correcting issues seen with the earliest guns???

For future reference, my M&P 10mm has a build date of 04/25/2022.

Update at top.

quote:

Originally posted by VictimNoMore:

quote:

Originally posted by Jimmo952:

Perhaps Smith is quietly correcting issues seen with the earliest guns???

For future reference, my M&P 10mm has a build date of 04/25/2022.

There goes my theory! Lol.

Glad you got a good one!

quote:

Originally posted by 2000Z-71:
Update at top.

I think swapping the magazine springs sounds like the most viable option, for your circumstances.

Judging by the distance my M&P 10 slung the brass (a good 20-22 feet back and to the right) of the Underwood spicy ammo … a recoil spring may be in the works as well.

quote:

Originally posted by VictimNoMore:
I think swapping the magazine springs sounds like the most viable option, for your circumstances.

Judging by the distance my M&P 10 slung the brass (a good 20-22 feet back and to the right) of the Underwood spicy ammo … a recoil spring may be in the works as well.

Make you a deal, I'll tell you how the magazine spring swap works and you tell me how the recoil spring swap works.

2000z, wrt the second to last round jamming in the barrel hood, sounds like a mag lips problem vs spring problem.

If you look at a Wilson combat mag, the lips a whats called a control release…there is a definite bend on the lip. Looking at a standard usgi magazine it’s immediately apparent. My STI 2011 has the same kind of mag lips, and if one is even slightly out of spec it will become a jam-o-magic.

I think that’s what’s going on with yours. Can you ask Smith if there’s a spec on the feed lips? And did you send them in with the gun, when you sent it back?

Yes, both magazines were sent back with the pistol.

Update 2 at top.