In the Sako 85 the 9.3 X 66 (or 370 Sako magnum) is the most powerful round you can get - and still hold 5 in the magazine.
For the slight power advantage one would get with a .375 H&H over this particular 9.3 - you need to give up at least one round (or two - depending on the rifle) in the magazine.
Personally speaking, with a round that is this close to a 375 H&H (in speed, energy, and ballistic coefficient of the available rounds) - I'd much rather have the extra round (or two) available - especially, if I really needed them, in a hurry.
