It's more then likely the extractor spring that's located internally. They should have sent you a replacement. If not your going to have to get one from them. They don't last as long as they claim to.
I'm a big fan of the XL, I have one on each of my 3 open pistols. Other then the up and down buttons sticking they have been great, for me. SRO is also a great choice!
This is the best deal you will see from them.
If anyone is on the fence about this set up I would jump all over it. It is a great cart and bag Combo, much better then DAA.
Why would you be shooting N105, it's an extremely slow burning powder, that's counter productive for those types of bullet. You want a faster burning powder.