Well I took on a project that was fun. Customer said it fired and ejected a 22 LR and the brass split so he wanted me to see if I could make it work. Started by putting a liner in so the bore and chamber would be the right size. Then bushed the feed tube so the cartridge stop would work. Things seemed to be going good but it would jam after a few shots with the bullet hitting the top edge of the chamber. There is a cartridge guide above the chamber for the old 22 auto round so I thought making it lower would do the trick. I installed a screw and ground the head so it would clear the rim of the long rifle. Found out that was just a waist of time so I won't go into detail about it. Ended up welding a little on the rear of the barrel over the chamber and grinding it sort of like an inverted feed ramp. This did the trick and it will now go through all ten rounds with no hang-ups. Also had to move the ejector back a bit so it would eject an unfired round. Now it's almost like shooting a 10-22 Ruger, spits them out as fast as you can pull the trigger.