So I noticed that one of the rounds I've been carrying is about 1mm shorter than the others from the same box. I've read about 'set back' before, but I haven't read about what to do with a round that is discovered to be suffering from it. Can I fire it, or is the danger of too much pressure too high? It is a 'regular' pressure round, i.e. not a '+p' or '+p+' round.
If I shouldn't fire it - or for any other unfired round that I determine shouldn't be fired for whatever reason - what is the protocol for disposing of a live round?
Thanks for your help!