I had a gun that when you "rang " it sounded awful . Some kind of dull rattle . Loose bead sight ! Ringing is a simple ,practical, rule of thumb test but it is limited to the experience of the person involved reading the results and interpretation of that information . It is not the be all and end all nor is it definitive but its the best you can do without a lot of equipment and has worked well for a couple of hundred years .

Last edited by gunman; 03/01/15 08:15 AM.