My RFD uses a courier that's insured specifically for firearms. I'm unsure of all the RM pressure vessel legislation cobblers but the courier associated with my RFD knows its 'a firearm' in the box that he's picking up and therefore it's handled in the appropriate manner - meaning, no clueless RM clerk is going to poke and prod and impound. Type of firearm, I'd suggest, is pretty much ignored as to their mind all the legal documentation has been sorted at my RFD, so off it goes.

Craig.