It's unfortunate that some companies employ people like that. He's probably a product of inadequate supervision, because if his boss knew how he treated customers he'd probably be out of a job. Maybe it's time to call and insist on speaking to his boss. That might strike the fear of God into him. If not, cut your losses, send the rifle back for a new stock, and (if it were me) trade the rifle in for a Tikka.

Mike