I would also ask did he use loc-tite on the ring screws? Sometimes new rifles will shoot the ring, base, and action screws loose after 50 rounds of so. Tighten them up and they should never loosen again. You don' t need them white knuckle tight, but soundly snug. I use the blue loc-tite (removable type). Also some anti-seize, like machinist use works good.