ive been thinking about stoning my bolt camming surface on my 24/47 mauser to tackle my stiff bolt problem. the trouble is im not sure what that means. where is the camming surface?? is it the track that includes the seer?? or is it the track that my cocking piece lives in? or should i give up and give it to smithy ....or just get stronger... another question is what type of stone is used for this? one of those fine grit stones that come with knives or is there a certain type to buy??