Para, I have a Mark V Safari Classic (AAA French walnut straight stock with minimal drop at the heel, Pachmyer decelerator pad, quarter rib express sights with one standing and one folding leaf. Hooded front sight, barrel band front swivel, steel grip cap, two panel hand checkered bolt knob, the Weatherby that doesn't look like a Weatherby. Only 140 in 375 H&H were made in 1992.
Anyway, I use Fed 215 GM primers, RWS cases, 74 gr of ReLoder 17 behind the 299 gr Shock Hammers bullet. I'm getting 2670 fps. Hammers have a bit less bore resistance and get 75-100 more fps per charge. Hope this helps, JM