stove piping , what is that?

When a extracted shell casing gets jammed in the action while the slide is returning to its home position,  it is called a " stove pipe jam"
This can be caused by a few different  things, most common is weak elbow  lock and catching the casing in mid air during recoil. Another is a weak spring in the slide, heat and use will weaken this slide action spring,  or return  spring over time, simply  replacing it ( very easy to do yourself ) will have you weapon perfoming at peak performance  again.

Get a complete  spring kit for your weapon, sooner or later you will need it.

Good advice.
I have been talking about getting rebuild kits for all of our weapons. Guess I need to get on it.