S&W 4513TSW - Comments Welcome

[GregAllCalibers]

Recently, I started having a failure with my S&W 4513TSW. After it goes bang, the casing ejects just fine, but when the slide moves the next round into battery, the back of the casing (on the new round), sometimes will end up on the *wrong* side of the extractor (towards the barrel), instead of flush against the breech. The result is the breech is not fully locked and the gun will not fire.

You have to give the slide a good push from the rear to seat the round when this happens, snapping the extractor over the rim. Probably not good for the extractor, even though it's spring loaded.

Getting new mag and recoil springs helped a lot, but still got one failure in 400 rds (started with very clean gun, kept shooting until a got a failure on rd # 221). The failure almost always happens on the ast few rounds in the mag (makes sense, that's when the mag spring is more relaxed).

Is it normal, during the cycling of a round, for the back of the new casing to sometimes end up on the forward side of the extractor, then snap under it when the slide closes under recoil spring pressure... or are autos always supposed to move the new round underneath the extractor as it's ripped from the magazine? IF this is the case, then why does the extractor have a spring on it (only for pivoting the spent casing away, with nothing to do with the new round?)

And finally, could limp wristing this light .45 gun cause this type of jam?

Thanks for your help.

Best Rgds, Greg
Dallas, Texas
NRA Member

 

[mdao]

I had a similar problem with my 3914 when I replaced the original recoil spring with a Wolff XP spring. The spring that Wolff sent was about 3/4" shorter than the original recoil spring, and I ended up with the same problem you're having.

 

[GregAllCalibers]

This happens even with the original recoil spring. Any more information is appeciated. Thanks in advance.

 

[rbmcmjr]

Is this problem limited to a specific magazine? It sounds almost as if the round is coming up out of the mag before the slide is in position to guide it under the extractor. Maybe the feed lips are damaged?

Rick

 

[Alan Fud]

It isn't a mag problem but a spring problem. Had the same issue with my 3913TSW & 4013TSW. Get the heavier spring.