The reason you've had no responses is the 375 Ruger is a bottleneck rifle cartridge 3.34" long, same length as .30-06. The Alaskan is a short barrel Redhawk revolver and its cylinder would be far too short for that round to fit into.
The Alaskan is available in .480 Ruger, which uses a 0.475" bullet. Is that perhaps what you were asking about?
Ahh! My eyes skipped over "Hawkeye." In that case, the Hodgdon web site has a list of loads for a 270 grain jacketed Hornady SP bullet in the 375 Ruger. Knock those start and maximum loads down 5% for the longer and higher start pressure TSX at the same COL.
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