Well, for one thing D'Arcy's customers often change their mind about what bullet they want to use. Plus the vast majority are globe-trotting hunters who may end up using whatever ammo is locally available, because their ammo with the "right" bullet didn't show up.
So D'Arcy makes damn sure the rifle will feed anything, and has found that feeding empty cases is the best test. His rifles have a reputation of being absolutely foolproof, which is why his waiting list is very long--for rifles that cost $14,000.
Now, you may think his customers are fools, and that's your prerogative. But they don't think so.
