I just got my brand new M&P 9mm with 10 round capacity. I never shot it yet, but I did load the magazines. I can only fit 9 rounds in both mags, even with a UpLula speed loader only 9 will fit. This is my very 1st handgun, so forgive me if this is a stupid question. Am I doing something wrong? Or is the spring just so new and tight 10 rounds will fit after a few loadings?

They will eventually take the 10 rounds, but it will then be very difficult to insert the magazine into the gun if the slide is forward. Sometimes, the fully loaded 10 round magazines induce a malfunction. I dodnt know why they had to cut it so close on the 10 round mags. The 17 round mags have some play when fully loaded, the 10 round mags are just too damn tight.

Simple: Your state government will charge the company with a crime if it is possible any way to somehow get more than 10 rounds in the magazine, ever.
Therefore, the required magazines are too tight for proper functiioning when new.
Aren't you glad your state government is helping design your guns?

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Science plus Art

I have the same issue. The speedloader will NEVER load the 10th round. You may be able to get it in by hand, but I just go with 9 rounds. When the 10th round is loaded, it feels funny when loading it into the handgun.

Also, if you need additional mags, check HERE

He did not mention where he is from, but I figure its one of the big 4 when it comes to nanny state anti-gun laws (NY, NJ, MA, CA). Gawd do thost 10 round mags suck...

I know this will be a difficult concept to understand but here you go! If you can't get 10 rounds in the mag,load 9 put it in the gun, rack the slide to load a round remove the mag add 1 round and you now have 10 rounds in the gun! I'm betting the idiots in the goofyfornia legislator figured that if they allowed a true 10 round capacity magazine, that a person could actually load 11 rounds in the gun! Just my theroy and may be incorrect.

Sorry, but I don't think your theory works well. If the law says that a 10-round mag is the max, then it's the magazine that they're talking about.

Additionally, in IDPA, the rules state that the gun shall be loaded to the Division capacity so technically it's a no-no to start out with only 10 rounds total in a 10+1 gun.

FYI, my Sig P226R 10-round magazines take 10 rounds easily. I have a bunch of 9mm & 357/40 10-round mags for IDPA so I don't have to count and/or worry about screwing up and load 11-rounds and have to take a penalty. OTOH, when not in competition, it's loaded with 15 rounds of 357-SIG.

same issue here. I use the uplula and when i try to push down after 9 rounds, it comes to an abrupt stop halfway down for the insertion of the 10th round. This abruptness makes me think that the spring is at its maximum compression and it won't be possible to ever fit that 10th round. I have the matte mags with the gray plastic follower.

Yep, manufacturers are so afraid of the 10 round laws in the Occupied States that they make it impossible to get that 11th round in there by making it impossible to load 10!

I know it's possible in some pistols to use a 10 round .40S&W magazine (a legal magazine even in the OS) and get 12 rounds of 9mm working. It's a magazine restriction, not a pistol restriction. And, really, unless you hold up the local liquor store no one cares.

-- Chuck

OK, so here goes the story. I called S&W and asked them about the 10th round in the mag and they said its a stiff spring and will loosen as you use the gun. Eventually you will be able to put 10 rounds in the mag. I am in NJ using the matte mags with the grey plastic feeder/follower. Blasted 150 rounds through it last night, still not even close to getting in the 10th round. In case you are all wondering, I was using the green and white box of Remington UMC 115 grain and not one single problem.

I've had my 9c for 15 months and I still can only get 9 in the magazine. I just except it.

Yep, its not gonna happen unless you happen to get a lucky mag or modify the mags somehow by cutting the spring or filing down the follower. Dunno if that's ever been tried, but definitely not recommended though.

Mine were next to impossible to fit the 10th, but now after 500 rounds through it, it is starting to get a little easier to fit the 10th.

ive had the same problem with that final 10th round going into the mag. im in canada so ya our 10 round law sucks!

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HOOCH

IDPA issue? Min load = max mag(or 10) +1 in pipe.

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Gerry

wow. great thread to come across . have had mine for 9 months, only get 9 rounds in it, was wondering about it all the time, but just accepted it. Figured the spring was very tight and would loosen in time.

I keep a loaded mag in my safe to try to loosen it. Someone told me not to keep the mag loaded, it would prematurely wear out the spring, but I don't think that is an issue here...

Move to Texas my 10 round mag friends! Problem solved. Actually I bought 2 of the 10 round mags strickly for reloads in IDPA. Same story as everyone here and the 9 was a you know what to load, 10th round, forget it. SO I called S&W, told them my issue. Sent them the mags back and they sent me 2-17 rounders. Problem solved. Now when I reload mags for IDPA, I have to count bullets.

I had the same problem with the 12 round mags for my 9c and could only put 11 rounds in them. It is not the spring, but rather the follower is too tall. I disassembled them, ground off about 1/16" from the legs of the followers, making sure there were no burrs from the grinding and a slight bevel, so they won't hang up. They now take 12 rounds with no problem.

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NRA R.S.O. & Life Member

By the way, I have 2 10 round mags for sale

HERE

New update, I was showing a friend my UpLula speed loader and I said I can't get the 10th round in my mag. He says lemme see that 10 round mag and that UpLula. He pushed down hard and wah-lah the 10th round went in with no problem in both mags. I put 350 rounds through the gun in case you were wondering. So all you have to do is just push hard on the 9th round and the 10th will fit. Its fits just perfectly. Don't force it, just apply steady pressure.

Actually you don't have to count rounds because all you have to do is look at the magazine and it clearly shows how many rounds, but in competition you might want to load only what you are supposed to by setting up boxes that have just the amount required for any event!

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59,M&P9,40,40C,357,(2)45,G26

I just picked up a new M&Pc 9mm last night. Weapon has the 10-round mags and I was able to load both mags with 10 rounds by hand. Tenth one was not too difficult. But the mag did not completely seat well when the slide was forward (I was goofing around with it and did not want one in the chamber).

I guess I could have slapped the mag harder, but did not want to force it and maybe break something. Maybe that's an irrational fear

But is sounds like this gun won't handle 10+1 in a stock condition, even after the springs break in?

I put 1000 rounds through mine since I posted this thread. The 10th round is still a little difficult to get into both mags but it does fit when using a speed loader. However with the slide forward and 10 rounds in the mag it will not click into place. Only with 9 rounds will it click into place nicely. Also noted I called S&W and asked about the slide stop being difficult to release with just my thumb. They said it is a "Slide Stop" not a "Slide Release". With the mag ejected and 1000 rounds breaking in the gun I can now use the "slide stop" as a "slide release" but it is a little tight. When a loaded mag is inserted with the slide back the slide stop now becomes a slide release with ease. Now, when you insert a loaded mag and slam it into it with the slide back sometimes it auto loads and releases the slide stop. I also called S&W on this after watching videos on YouTube and they told me it is an M&P gun, imagine you are in a gun battle and you need to load a new mag fast! The slide lock is meant to auto load the round, it could be the fraction of a second between life and death. I am in the air about that with many others confused if that is just a flaw in the gun. But, then again S&W came up with a good argument of why it does that. My opinion is if its meant to do that then why do you have to SLAM it in.

Well, throughout my years of shooting experience, I'm not going to trust how many rounds are in a mag by simply looking through the holes. I have seen on a few occasions, rounds double stack in a magazine on one side.

don't worry... springs only wear with repeated cycling. storing a spring compressed should not damage it significantly. i'm in the habit of keeping 2x 10-round mags filled in the safe with JHP rounds for zombie invasions. I use my other 4 magazines for range use and rotate them once in a while.

this is pretty much the trick. just drop $20-30 on a LULA and don't look back. you might have to stand on it the first few times to get the 10th round in, but it will eventually work.

here in Kalifornia, state law is 10 rounds on the magazine, but you are always allowed the +1 chambered if you so choose. inserting a 10-round magazine on a closed slide can be a problem though, so you have to be extra-vigilant when loading up if you don't slap the magazine hard enough. i learned this the hard way a few times during training classes... i don't think you should have malfunctions due to the 10-round mag being jammed up against the slide, but you WILL have malfunctions if the magazine isn't seated properly... e.g. BANG -- click.

while it's an extra step, i slap the magazine in and check/slap it again before i holster, just to be sure. one of the accommodations we have to make for our awesome nanny-state!

Had same problem with the 10 round mags for my MP45f, got a Lula loader problem solved.

Greetings from New Jersey… After upgrading with the apex tactical trigger and sear, the storm lake extended and ported barrel, the Sprinco recoil spring and the Hogue finger grip. I cut 3 loops off the spring of my 2 mags and filed down the guide. So much easier to load all my rounds and the 10th is like nothing. More important to me is I could insert the clip with the slide back or forward. I guess I should say Hello because I am new to the forum and let you know I just got my firearms license 2 months ago and yes my M&P is my first gun. I have put about 1500 (trouble free) rounds through my full size M&P 9mm and I am in love... 500 more rounds waiting for my day off on Monday.

I just cut 1/2 loop out of the bottom of the spring and rebent the bottom and now all my mags work great. No problem with the 10 and will not even come close to 11. It also cleaned up the "hard to seat when full" issue.

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Gerry

Either that or we are just seeing poor quality control with a spring supplier sending the manufacturer springs that are to stiff and the manufacturer not carrying enough to insist on better quality control. I suspect the latter.

Take Care

Bob

I never had that problem with non of my M&Ps but always had that problem with my Sigma and my SD. I just forced the extra round in the mag and let the mag sit fully loaded for a week or so. After that, it should be easy to fit all 10 rounds inside the mag.

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Don't look, reload and shoot!

A ten round, double stack 9mm magazine is what should be against the law. Goofy *****, liberal politicians...

Any one have a extra 15 round mag for m&p 40 cal

Got that right vmaxsplat

I bought the extra magazine extensions for my Glock 26 which holds ten rounds and makes it feel a lot like a Glock 19 so that all my fingers hold the weapon.

It took all I could do do put the 11th round into the first two magazines that I used now after several trips to the range all three hold 11 rounds but should hold 12 so now what I do is use my UPlula and keep them all loaded then take the rounds out by hand and then reload and eventually I will be able to load 12 rounds into them!

Or you could shorten the spring and even shave off the bottom of the follower by about 1/4 or 1/3 using a grinder, it is pretty simple for me but I am just a redneck from Tennessee!

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59,M&P9,40,40C,357,(2)45,G26

My 40c came with three (3) ten (10) round magazines. I loaded all ten rounds without a problem. I bought 2 more 10 rounderrs from Greg Cote (great fast service by the way) and loaded them with ease. Sounds like this thread is equal with easy to load 10 round mags and not so easy to load. Just a luck of the draw i guess.

out here
MP 1SG

Sorry for reviving an old thread, but I thought I'd post a more current update. I received my M&P9 a few weeks ago, and I'm in California so I have the 10 round magazines. I don't know if they're making the magazines any differently now, but I use the uplula speed loader and I have little trouble loading the 10th round in the magazines. I have to push down quite a bit for that 10th round, but it's never really a problem.

I recently purchased the 9c and use the UpLula loader to fill the magazine with 9 rds easily but have to force load the 10th rd by hand. Difficult but it can be done

Mine was VERY difficult at first. that last one was a B*TCH! The first time I had it at the range and tried to load it I realized I couldn't do that all day. I ran up and bought the Uplula and it was SO MUCH EASIER.. but the last round is STILL difficult to get in. Wait until you try and put that mag in. You have to slam it closed with your palm. But I haven't had ANY issues with misfeeds or anything from it. It shoots great and I love the gun. But yes, that last round is a pain.. in fact on my mags even the first one is very difficult because of the way it wants to roll into the mag.. it's VERY hard to get straight.. then 2 through 9 are great and 10 is near impossible. But that Uplula will help you get it done, you really have to push down on it HARD but you'll get it. Good Luck!

I have the same problem. I saw a video whith Hitchcock45 who said that he had this problem with a Glock and he decided just to leave the last round our of the magazine. I'm not as happy with that idea. Besides, Hitchcok45 is a better shot than I am- I need all the rounds I can get. Also, I hear there are some performance issues when you crowd a magazine.

Uplula was the best 26 dollars I ever spent. My 12 round mags are damn near impossible to load without it.

$26! Man.. I'm jealous, even though my Uplula was the best $40 I ever spent. Over priced at a local gun store, but still it was money WELL spent. Can load mags ALL day now.. just have to be able to find ammo to load them with! haha.

My 40 came with an Uplula, and yes I would have bought one had I known how wonderful loading magazines is with one...

I bought my first M&P .40 in California. Ten rounds fit in the magazines by hand with no problem.

Bill

After trying for weeks to get the 10th round in and the mag and/or to insert a fully loaded mag when the slide is closed, I decided to sacrifice one magazine to a try a few experiments.

I tried first removing 1 then 2 then 3 loops. While this does help, slightly, the last bullet still needed to be forced into place. The fix was to remove (file then polish) about 1/16th from all 4 corners of the bottom of the follower. After cycling a few complete 10 round through - without an issue - I then did the mag mod (3 loops, 1/16th off follower) on the rest of my magazines. Now I can hand load 10 rounds though I still use the uplola. There is still no way to push an 11th round in.

While in the magazine, I used the opportunity to polish the sides of the followers and add a little lubricant. Well worth effort, for me that is.

hi..
new mp9c, 4 mags. all difficult to hand load. let the mags sit for two weeks with 9 and 11rds in the mags (all rounds inserted by hand). after two weeks, used uplula to load 10th/12th rds. takes a bit of finess (trickery?), but the last round will go in. now only two mags refuse to load to max using just thumb/finger presssure. the gun fired properly with max rds in the mags. did not notice any difference inserting and firing with full or one-round less in the mags. also daily cycling the slide by hand to "loosen" the action (my new unit is way more stiff than the LGS rental mp9c - which has 10,000+ rds thru it). but the mags will eventually accept the full load (have not the proper tools to cut/polish steel).

cheers, ya'll

I have these 10 rounders for use in New York. Look on You-Tube about the fix for this! If you are handy & own a needle nose pliers, then FOLLOW THE YOU TUBE details on how to open the mag. & snip the wire at the bend, also sand the plastic 'legs' on the insert. I also filed the sharp edges of the wire. Reassemble & use the Uplula loader...& ALL IS WELL...a 10 round mag. that snaps in easily!!!

have two 10rd mags for full size mp9. the base plate is actually an extended device substituting for the longer 12/15/17 magazine. the plate is different from the standard 9c mag. where can i get flat or finger rest baseplate for the full size mp9 magazines?

thank you !!

I had great difficulty getting 10 rounds in my M&P40C mags when they were new. This was before I got an Uplula loader. I kept the mags loaded fully for a week but they were still to hard to load. What I did was load & unload them a half dozen times & that helped a lot & then keep them loaded with as many as you can get in.. Didn't help the fingers any, though, lol. They were sore for a week. I believe the springs need exercising both in compression & decompression. Then I started to actually shoot the gun at the range. Even though it's no longer hard to load by hand I still use the Uplula. I'd be hesitant to make any modifications on the spring or follower. You might run into feeding problems once the springs loosened up.

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Former USN, Retired US Army

Has anyone been able to load 10 + 1 in the MP9? Like previous poster said, it won't load a full mag with slide closed, much less the 10 + 1 as advertised.

haven't had that happen. mp9c. 10 and 12rd mags. about half the time load mags with uplula, half by finger/hand. no probs with 12rd, last round is kinda tight on the 10s, but they are range only. with one in the pipe, re-fueling the mag after slide in battery, nothing seems to hang or feel different from open slide mag replenishment. so, not sure if my experience is the norm, or yours.

cheers