Sir Jerry, If you are feeling your age, you just need to rest up a bit more. Gaur ... now that is one heck of a bovine fantasy. Mercy bo coops.
I think a 16.9" .458 B&M+ will tone it down at the muzzle to about what your 24" .458 WM+ was doing at 75 yards. Knocking off about 150 fps at the muzzle might allow a lower impact velocity on long shots at game. Gotta handicap the 404-gr Shock Hammer somehow. Might have to slow it down even more to catch one.
Halloween should be a treat for me when the Pac-Nor barrel arrives, then we shall get back to .458 WM+.
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.