I think it may be relatively simple to answer your query Vic.
If you make the majority of parts for a gun using hand tools and a lathe and manually controlled milling machine. Then you assemble those parts and file and fit as necessary I think that would be classed as hand made.
If you spent a little time filing and fitting machine made components until they functioned correctly as an assembly that would be hand finished.
If you assembled machine made parts into a functional assembly that would be called American 'Best'.
Sorry couldn't resist that.
British is Best