200 grain 10mm Hornady XTPs, blue MMP .50/.40 sabot
300 grain .452 Hornady XTPs in black Harvester crushed rib
And probably anything remotely close to those two combos. Try starting with 90 then work upward to 110 grains BH209 and see what yields best accuracy. Win209A, Fed 209A, or CCI 209M primers.
Lucky dog!
ps: if you want to scope it EABCO sells a Weaver style base that will provide maximum flexibility in positioning of rings/scope.