I understand new rifle or custom build, but man, it'd be tough to beat a pre-64 or old pre-salt Browning Safari with long extractor, i personally CGAFF about market value, mine are not for sale, good luck to you, H-4831 under either 200 or 220gr Partition will do it all for you to an easy 400+ yards in the game fields/mountains.
I have a Lyman receiver peep on one a pre-64 300 H&H, a little daylight over my 400 yard gong which is 18"x20" put the 220gr Partitions in a nice 6 inch rounded group well centered in the bottom one third of the gong, that's spine hold and dead animals all season long, with NO rear bag, just a front rest with rifle held in hand much like slumped over a pack, down tree or rock.
The whop reported back to me says the old Holland Super 30 is still packing serious freight at that range with the 220's leaving the rifle at 2750 fps.
