I couldn’t agree more with they guys saying pick one bullet for both types of animals. Having 2 different bullet/ loads will also give you 2 different points of impact, so you would only be sighted in for one load at any one time. 300win mags generally like the slower burning powders. Any of the load manuals will have good data for the bullet weight you select, and hogdgon web site has tons of load data also.
JTD