I recently got a Henry .22 lever and had a misfire within the several hundred rounds. I noticed that there is slightly less of an indent on the casing than on fired rounds. I read in the manual that if this happens the gun should be taken to gunsmith. I also have a Ruger 10/22 that has had a few thousand rounds through it and most of the misfires with that one (not that many, a few per brick) are the same. Is this anything to worry about?