Since no one has responded to you, I will take a shot.
I only work on Model 14 & 141's and have no desire at my age to widen my knowledge base but that being said here is an opinion. You state that the carrier is not lifting the cartridge fully up and that shorts work better both would seem logical if the carrier dog spring was weak............that's the way it works on a Model 14 but I'm not at all aware of the internal workings except they were designed by the same guy.
If the spring is weak on a M14 it won't fully lift a cartridge into place and of course you get a jam. The .22 short being about 1/2 the weight of a Long Rifle the spring would indeed lift it better/easier. Good luck on finding a carrier dog spring and/or someone that can fix it............if it has a carrier dog spring....lol. Hey thought I would take a shot.
Jim Peterson
Charlotte, NC
Model 12 Jams
Re: Model 12 Jams
Jim Peterson
Re: Model 12 Jams
Since I had nothing to do I checked the schematic for the Model 12 and indeed it has a carrier dog spring, Numrich has them for 2.25 and it looks nothing like the ones used on the Model 14. It is a sturdy little coil spring that looks like it would last a lifetime but its cheap and its at least a place to start working on the feed problem. If its the "dog" itself that could be a can of worms because there may be a variety of styles.
Jim Peterson
Charlotte, NC
Jim Peterson
Charlotte, NC
Jim Peterson