I cheat.
Kreighoff drilling in SXS 16ga over a 7X65R (pretty much a 280 Rem) and a 22 LR shotgun barrel insert. It wears a 1.5-6 Zeiss in claw mounts.
Traditional 3-gun battery for N America:
3-digit Mdl 70 30-06 with 3-9 American made Burris
Browning B80 3" 12ga with 26" invector, 28" invector, and 22" slug barrels
Marlin Golden 39 with a Lyman Alaskan CH scope