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M&P 9L coming out of battery


CPW1265

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I shoot a M&P 9L with a 13 lb ISMI non captured recoil spring using Freedom Munitions 115gr 129 power factor. I've been having a problem recently. When I reload with a round in the chamber during a match the slide is out of battery. I know there are many different things that can be the cause but has anyone else had this problem?

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I would guess that 13 pound spring has weakened over time. Try a new spring.

Or get more froggy and also lighten the striker spring. Those two springs work against each other.

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What Sarge said...

The recoil spring has to overcome the force of the striker spring. As the recoil spring force decreases (by replacing with a lighter one or from wear) the striker spring force can more easily overcome it and push the slide out of battery.

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This happened at my last match. Would do a reload with one in the chamber and the slide was slightly out of battery and ended up getting a light strike. I will be popping in a new recoil spring.

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I recently changed to the 4# Wolf striker springs, and it made a difference in the battery issue. However, I ran a batch of ammo with hard primers, and had about a 1/10 failed ignitions. Be sure to test your ammo before a match.

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Replaced my old recoil guide rod and spring with a new factory one from S&W. No light strikes at the match on sunday and the strength of the spring is noticeably stronger which keeps the slide really locked in battery.

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