end the jams.
use a 20 gauge bronze bore brush saturated with a good bore cleaner. Attach it to a coated flexible cleaner cable. Attach the other end to a variable speed drill, and spin that chamber clean.
Most Rem 740/742/7400/4 owners only clean from the muzzle, and the chamber never gets clean. Leftover powder residue in the chamber gets hard, and grips the case walls impeding extraction, and viola....a jam.
Keep those chambers clean.
