375 Winchester load help, please
My project involves a Winchester 94 Big Bore in 375 Winchester caliber. Original 375 Winchester brass (for length and neck thickness) has become hard to find and too expensive to buy when found. I have a supply of Starline 38-55 brass (2.080") and Lyman molds 375248 (255 gr. plain base) and 375296 (265 gr, GC). The rifle readily feeds up and chambers both of these boolits in 38-55 brass. What I am looking for is recommendations on powder selection and charge weights that may exceed the traditional 38-55 load levels in the published manuals, due primarily to the strength of the 94BB. My alloy supply includes pure lead, COWW and linotype, plus tin salvaged from solder. Powder coating may be an option as well. My goal is to create accurate hunting ammo. Thanks for you input.