With the 9.3, beyond 150m aim one handwidth higher or so, 10-15 cm. It has a noticable bulletdrop compared to the .300. The .300 is more precise, but has slightly less punch at maximum range, some say (I agree), it's real "disadvantage" (not the special edition that cannot be bought) is its ugly looks (its one of the oldest weapons in the game, so a very early design of their artists), and it has no cartridge, needing longer time to reload.
For the ibex at maximum range, the 6.5x55 and 8x52 I would expect to be the weapons of choice, with the 6.5 probably preferred. I mean the ibex is no giant of an animal, isn't it.
Well, I will see. Carrying the 6.5 gives me a nice excuse to carry my .454 as well, for the brown bears.