Stove Pipe Jam Causes

[emb]

I have a Springfield Armory 1911A1 Milspec. It is just as it came from the factory. I probably have somewhere between 1500 and 2500 rounds through it. I have a slight problem with stove pipe jams (empty case). I don't understand what causes this.

This pistol stove pipes only occasionally with all types of ammo-maybe 2-3 times out of 50(mostly Win White Box or Rem UMC). I just started reloading for this pistol and had the same experience. I use Winchester cases, 230 FMJ Remington bullets, 6.2 gns of WSF, OAL right at 1.275 (from memory), and Federal primers. I crimp the bullets right to SAMMI specs. This is a good accurate load for this pistol.

I don't rule out that I may be "limp wristing" on occassion, but I don't think so. I don't have similar problems with my other pistols-Glock 36, S&W 59, CZ RAMI or Colt mustang. Are there any other causes I can look for?

Thanks.

 

[rcmodel]

Take the slide off and check the extractor tension.
It should be able to hold a loaded round against the breach-face and withstand a little shaking.

You can spring or bend a little more bow in it by hand if necessary.

It might be "clocking" or freely turning to different positions in the slide every shot.
A tighter FP stop can be fitted to stop that.

Might also check for a loose ejector.
I understand some guns are coming out with no retaining pin nowadays.
Just glue holding them in.

Other then that, a too heavy recoil spring can cause it to short stoke.
But if the slide locks open on the last shot every time, probably not that.

On a mil-spec gun with a small ejection port, the brass sometimes comes out, hits the top/side of the slide, and bounces 180 degrees right back in the port.
Just in time to get caught by the closing slide.

Generally a change in extractor tension will be enough to change the ejection pattern, and get it to bounce someplace else.

I seriously doubt it is limp-wresting, unless you have a very +P recoil spring.
It's about impossible to limp-wrest a 1911 with a standard 16 pound spring in it.

rcmodel