I have a question regarding my newly acquired Model 66-2 regarding the hammer nose and a channel in the frame made as to facilitate clearing it. It seems there is wear in this channel. The hammer nose clears it, but if I tilt it all the way up in the hammer, then it will make contact with the channel, but is pushed down and clears it. Is wear here normal? Should I worry about the hammer nose breaking? The hammer nose has no sign of wear, but this channel does and is quite thin at the begining.