Funny thing XS ,I was working on a Spanish sxs 20 gauge the gun wouldent fire on one side and the gun looked basically unused ,with the exception of a broken /repaired wrist ,I've done everything with this little #$%#@ ,changed springs ,new firing pins ,polished all contact surfaces ...then yesterday it dawned on me to look at the rim recess lo and behold the case rim sits below the breech just a fraction ,if the shell is lodged in just so it go's bang and the primer backs out ,if it don't you get just a slight mark on the primer and obviously nothing ...she locks up tighter than a frogs arse,so I'm pretty sure I nailed it ...I guess the previous owner got so sick of the misfire's he wrapped the stock around the nearest tree
