I suspected that the grip screws had been tightened too tight and the screw was riding on the magazine.

I took off the grip panels and removed the screws and, sure enough, the magazine dropped free.

If you are having a problem with your Sistema doing that, try that solution.

While I had it apart, I decided to polish the feed ramp.

This is a simple procedure and will help with feeding in most pistols.

These pistols are famous for not wanting to feed anything but Ball, but I figured I'd give it a try to see if I could make it eat anything I fed it.

Here I am using a grit impregnated rubber bob on a Dremel Tool to smooth the edges on the barrel.

I then used a felt polisher with polishing compound to shine it up.

That green "rock" in the background is the polishing media.

I also polished the feed ramp on the frame.

Here's how they should look when you put them together.

I bet it feeds now.