preferred method for breaking in a 22.... yes there is. First off, allways clean your new/used rifle. a new rifle will be full of chattermarks, and metalworking crap. so clean all that out. then take about a bulk pac of whatever is hi speed, fmj or solid point, copper washed. then, let it all rip. The hi speed solid points will smooth out your semi auto action, and get rid of all the bumps and lumps inside the bbl. when you are done, clean the bbl very good, VERY GOOD, one time, making sure to get out all the copper, so get a copper specific cleaner, which will get out all the other crap as well.
You are now done, with a ready to knock em dead 22.