I HATE drillings...if they're not mine.
I took my last deer with a Triebel, Augsburg in 16-16-8X57JR...same as your friend's. It has a Hensoldt 4X 3 post in claw mounts.
JB's squeeze has a great Sauer 3000 circa 1960+or- in 6.5X57R and 16ga with a 22 mag einstecklauf that drops into the right shotgun barrel and is great for potting small game...sighted in at 65 yards to the scope. I hope Eileen lets him use it sometime.
At 7.9X57 it sounds like his is an 8X57JRS with a .323 bore, not the older traditional .318 like mine. That makes reloading MUCH easier.