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Smith & Wesson M&P Pistols All Variants of the Smith & Wesson M&P Auto Pistols


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Old 07-11-2015, 03:56 PM
7Kniazev7 7Kniazev7 is offline
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Default M&P 40 to 9mm extraction issues

I have a M&P 40 and like others I bought a 9mm factory barrel. I also bought 9mm Magazines. So I went to the range yesterday for the second time with the 9mm barrel and I had numerous extraction issues. Many of the cases were really stuck in the chamber. In order to remove them, some force needed to be applied to get them out.

I was using both Factory 9mm ammo and reloaded 9mm that I had bought at a recent gun show. The factory ammo seemed to never have an issue this time, but the last time I used the barrel I had one that failed to extract and that was with the 40 magazines. Yesterday all of the rounds that failed to extract were the reloads. I mixed the rounds so I could tell what was having the most issue.

So my question is, Is this an extraction issue or a reloaded ammo issue? Any help would be greatly appreciated. I now wish I had bought a conversion barrel!

Last edited by 7Kniazev7; 07-11-2015 at 04:01 PM.
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Old 07-11-2015, 04:22 PM
Pre 29 Pre 29 is offline
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Wouldn't the extractor be in the wrong position??
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Old 07-11-2015, 04:53 PM
dswancutt dswancutt is offline
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100% the reloaded ammo issue. I have the same setup, run my own reloads and have had 1 FTE in about 300 rounds. I use 9mm mags and a factory barrel.
I would NOT use the reloaded ammo. It sounds like it was improperly sized if it is sticking in the chamber like you describe. Are you seeing any signs of excess pressure with the reloads?
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Old 07-11-2015, 11:04 PM
7Kniazev7 7Kniazev7 is offline
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After inspecting some of the casings I was able to retrieve, there were some definite signs of excess pressure. Thanks for the advice. I won't be shooting that ammo anymore. I will be trying out some factory ammo again the next time I go to the range.
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Old 07-11-2015, 11:13 PM
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Rastoff Rastoff is offline
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I'm a little confused. Were you using your .40 mags with the 9mm ammo? Or were you having extraction issues with the .40 as well?
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