I cut my botl with a dremmel, but only becaue i wanted ot learn how ot use it
those cutting disks are simply amazing!
so long as the threads still have something to hold onto you can cut i. I have most of the screw exposed, but ti's still got enough to hold the pin in.
and if you're wanting to dryfire, flip your bolt upside down it saves a butload of air(unless youre already running realyl low pressure, then i guess it doens't matter so much)