trouble with magazine dropping out

[johnme]

Hi everyone, I just started having problems while shooting my M&P shield 45, the magazine is dropping down a bit while slow firing the pistol. After the recoil of the shot at times not every mag full, you can feel the mag. drop down about a 1/4" with live in round stuck in the chamber.
I'm very use to heavy recoiling revolvers, 44 mag and 357. Two 40SW, Glock and a Sig. also I'm a left handed shooter. The mag. drop happens with all the extra mags. Can't see how I could be pushing the release button after shooting. I don't remember the round count but I'm sure It's not over 200. I've been a had gun shooter for 40 years.
I'm hoping I can get some ideas on what could be going on before calling S&W. I also have the shield in 9mm so I'm comfortable with the design, as well as the45acp round is heavier than 9mm .

 

[JTQ]

I don't know if this is an issue with you or the gun, but Patrick E. Kelley, also a lefty, routinely accidentally releases mags with his trigger finger while shooting. Here he explains it with a SIG P227. If you watch a lot of his videos, you can see him do it with several guns.

 

[Drail]

You have a defective magazine catch lock that is not fully engaging the magazine's locking notch or a lousy spring in the catch. Send it back or find a good smith.

 

[ontarget]

I have the same problem with my PT111 G2. I stopped using it for EDC because of this. I think for me its just my grip and I'm pressing the release under recoil. Still wont carry it if its going to drop the mag.

 

[Jim NE]

I've had two guns drop mags. A Taurus and a Ruger, both purchased new. With both, I spent several months thinking it was me, then finally understood the problem was with the gun. With the Taurus, I modded the mags because I didn't like the idea of the factory putting it back to spec because I felt there was a problem with the design. With the Ruger, I sent it back in because it seemed most (if not all) other people with that gun didn't have that problem. In both cases, the problem went away for good once I addressed the hardware problem and stopped presuming operator error.

Best place to start - go to a S&W forum and see how many other lefties are having the same issue with that gun. If few or none, send it back. I think the OP has too much handgun experience to be a likely source of the problem.

 

[entropy]

My friend shot his LCP II and kept dropping the mag; I shot it, and did not. He curls his RH thumb under the left, I do not. In his case, he was ejecting the mag with his RH thumb.