I have been reloading cartridges for over 50 years and I can tell you that it is common knowledge that with bolt action rifles, a reloader can get away with neck-sizing ONLY. However, with pump-action, semi-automatic and lever action rifles, experts recommended that the cartridge cases be full-length resized so that the reloaded cartridge will be sure to go into the chamber without any problems.
You can try not full-length resizing your reloads and decide for yourself from the results you have. However, you'll probably find that while a good many reloaded cartridges may load into the chamber without a great deal of trouble, some cartridges will not chamber properly and possibly may refuse to chamber altogether.
Hopefully, your extractor will get a good enough grip on the cartridges rim to enable it to extract the jammed cartridge without sliding off the rim. If the extractor can't extract the stuck cartridge, then you'll need to use a metal rod long enough to put down the barrel from the muzzle end and push the stuck cartridge out of the chamber. Don't use an aluminum cleaning rod... it's too soft and will be damaged by beating against the nose of the bullet.
Try
NOT to knock the stuck cartridge out of the chamber too hard causing the loaded cartridge to jam back against the bolt-face and possibly ignite the live primer. This probably won't happen if you "push" on the loaded cartridge GENTLY... at least in the beginning. Just be very careful if you must shove the cartridge out of the rifle's chamber so the cartridge doesn't "fire" outside the rifle's chamber with the action closed.
Good luck...
Strength & Honor...
Ron T.
