A friend helped me with my 1st 10/22 build. First thing "we" did was removed the bolt, and barrel, etc., and scrubbed the interior of the receiver with gun scrubber and a green scotch brite pad several times, coated everything with a light film of Mobil 1 oil, installed a Feddersen barrel and went to the range. I've never had a issue of any kind with different types of ammo. Runs like a sewing machine.