M&P CORE cronic dubble feed problem - MP-Pistol Forum

M&P CORE cronic dubble feed problem

This is a discussion on M&P CORE cronic dubble feed problem within the MP Pistol Tech Help forums, part of the Smith & Wesson MP Forum category; i have a 9mm core i keep having double feeds and failed to feed the round ejects and the next one gets stuck on the ...


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Old March 16th, 2015, 11:31 AM   #1
AFI
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M&P CORE cronic dubble feed problem

i have a 9mm core i keep having double feeds and failed to feed the round ejects and the next one gets stuck on the feed ramp i replaced mag springs and put in a new guid rod. first mag is 100% reliable after that i have non stop problems
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Old March 16th, 2015, 12:51 PM   #2
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That sounds like the identical problem that I'm having with my CORE, so far I haven't found a fix.

Next chance I have to get to the range I'm going to take the recoil spring out of my full size 40 and try it in this gun. The springs are supposed to be the same, the 9's have a different weight on the slide to make up for the difference. So far I've only run my reloads, but those same reloads function 100% in my other guns, but I get this ejection/feed jam on my CORE. Empty case still in the ejection port with a partial feed, it really sounds like the ammo is too weak for the springs, the empties aren't getting out of the way. I will also try some standard factory 9mm hard ball and see if might work.
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Old March 16th, 2015, 07:38 PM   #3
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Im useing factory ammo. Im seriously thinking about getting rid of this peace of shit and getting a gun that works
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Old March 16th, 2015, 08:49 PM   #4
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I have 3 M&P's, the other two have quite a few rounds through them and have never had a single hang up of any kind, feeding problems are fairly unusual on M&P's. Sometimes they need a little figuring out, its just a matter of working out what is causing the problem.
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Old March 16th, 2015, 11:15 PM   #5
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Limp wristing - Wikipedia, the free encyclopedia

How to shoot a Pistol with world champion shooter, Jerry Miculek
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Old March 17th, 2015, 08:46 AM   #6
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Limp wristing.
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Old March 17th, 2015, 11:41 AM   #7
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Not limp wristing it i know how to shoot most of my shooting is in tactical handgun classes or with instructors when were not doing a class
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Old March 17th, 2015, 05:37 PM   #8
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The incoming rounds could be hanging up on the edge of the extractor finger. If theres a sharp edge it could dig into the case neck and keep it from gliding up and into battery.
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Old March 17th, 2015, 06:28 PM   #9
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I have a CORE and many other M&Ps. Never had a problem with any of them. Now I have polished the heck out of the internals and feed ramps on each of them. Each gun had minor machining marks on the feed ramps that could have resulted in fouling buildup and feed issues. Each ramp has a mirror finish on them now.


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Old March 17th, 2015, 07:15 PM   #10
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I've been shooting automatic pistols in competition since 1968, limp wristing isn't a problem.
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Old March 19th, 2015, 09:01 AM   #11
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Magazine trouble is the only trouble I've had from mine.
I guess out of millions sold there is bound to be a bad one or two.
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Old April 10th, 2015, 11:30 PM   #12
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Let's get this straight... The casing that failed to eject is stopping the slide. Am I correct? Then this is not a feeding issue. These pistols don't "double feed". This sounds like failure to eject. Sometimes called a "stove pipe" stoppage (called this because the empty case is usually trapped in the ejection port looking like a stove pipe sticking out). The empty casing doesn't eject preventing chambering and return to battery. Seeing how you are convinced it isn't a grip issue, focus on the parts responsible for ejection. Check the ejector for looseness and damage. Check the extractor for spring tension, freedom of movement, and proper protrusion into the breech face. Quick way to check this is to slide a loaded or dummy rnd up face under the extractor. If the extractor engages the flange of the casing properly the cartridge should remain on the breech face (hold it horizontally, slide removed from gun and barrel removed from slide, just in case it needs mentioning). If those look good, cycle the slide with no mag feeling for anything that may retard the recoil of the slide. Should cycle smoothly.

I would not be surprised if it was the extractor/spring. The extractor must maintain control of the expended casing during recoil when it impacts the ejector and is propelled out the ejection port. Being a fixed ejector, ejection relies on the impact velocity with the ejector. If recoil is retarded (slowed) or the ejector is damaged or loose, these will take up valuable energy needed for reliable ejection.

Last edited by Twichinator; April 11th, 2015 at 07:50 AM.
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Old January 27th, 2016, 06:09 AM   #13
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Quote:
Originally Posted by AFI View Post
Not limp wristing it i know how to shoot most of my shooting is in tactical handgun classes or with instructors when were not doing a class
Have you found a solution yet? I have the same problem with my performance center 5inch 9mm...

The people that chime in with "limp wristing" as the culprit need to get their heads out from where the sun don't shine. smh
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Old January 27th, 2016, 10:53 AM   #14
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Quote:
Originally Posted by AFI View Post
i have a 9mm core i keep having double feeds and failed to feed the round ejects and the next one gets stuck on the feed ramp i replaced mag springs and put in a new guid rod. first mag is 100% reliable after that i have non stop problems

Howdy and Welcome

First question is since the first mag has no problems (as stated above) have you reloaded that mag and tried it again as the second mag. It could be the mag "lips" on your second mag.

I have two CORE's one is Ported and the other is not. I have replace the trigger system with APEX parts and use both for Steel Challenge competition.
The one that is not ported, I have milled windows on top and sides of the slide to reduce weight.
I have also replaced the factory guide rods with a FULL length SS Guide Rod UN-CAPTURED and an ISMI 13# spring.
I have also changed the striker spring to the APEX competition spring.
I shoot my own load with are 147g Hi-Tech bullets with 3.5g of Titegroup Powder and Federal Primers.
I have 10 Mags (6 S&W & 4 ACT Mags) with replace bases from TTI and springs.
The only problem that I have had is shooting some of the Freedom Reloads that have Heavy primers and I get an occasional Soft Hit (I now stick only to my reloads)

Try a few other mags before you give up and if you still want to get ride of the CORE send me an e-mail, but I am sure that once you work out the problem, you will love the gun.
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Old January 28th, 2016, 04:14 AM   #15
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what ammo are you shooting i went from 115 to 124 fixed ally of issues in mine. And before u say it sound be able to shoot anything I was a Proud owner of one of the First GEN 4 Glocks in my area. Ammo matters (IE recoil spring) I believe GLOCK are up to number ver 6 now.
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