brasskeeper, sir;
Timely question!
I just "found" my elk load last week, when my "new" Savage M116 (the previous owner had fired just six rounds, and gave me the rest of the box) gave me some amazing results.
With a new rifle, some new-to-me .338 Barnes "Triple-Shock" 225-grain bullets (I hate those catchy cutesy names), and a powder I'd never tried before (Reloader 19), I hied meself to the range with a set of loads with increasing charges in each batch.
I fired three-round groups at each of 73.0, 74.0 and 75.0 grains, and ALL THREE of these loads grouped under one inch at 100 yards, with the 74 and 75 loads right at 1/2". The velocity for the 74 grain load is 2900 fps, and that is my elk load, over, done, finis, no problemo. In forty years of handloading for hunting, I've never arrived at "THE load" with such ease and so little fuss. Amazing.