You don't need 150!! I hunt with 90 gr loose T7 and an 300gr XTP past 150 yds routinely. I swab between shots, load, then lube with bore butter (ahead of the seated bullet so is not to contaminant powder charge behind mmp sabot).
I even go so far as to score the bullet by rolling it between a flat surface and a file. This embosses the crosscut file pattern lightly into the copper jacket. The bullet locks into the sabot, which eliminates shifting in the sabot when loading, and the sabot transfers max spin to the bullet without slippage.