The 9.3's are obviously big game calibers and as stated by many here about 4x in a scope will cover your practical needs. I posted earlier stating I use a fixed 4x and a 1.5x5 on my pair of 9.3's and they've not let me down.

As far as trajectory and range goes, practical shooting distance is about 225 yards, where trajectory is kept within a 3 inch datum. We all know though, that if we understand range and can pick distance, (or use a rangefinder) 300+ yards is no issue for a well loaded 9.3.

250 grain bullets at better than 2600 fps and or a 270 grain Speer at 2500 fps will deliver the goods. I've made hits on large medium animals at 330 yards and dropped both 450 lbs beasts within yards of bullet impact. The terminal affect of the big Speer was most impressive and when we got to the dead beasties, the internal damage and penetration were everything one could hope for.

Like all things, knowledge and skill coupled with heaps of practice in practical field applications make the difference. Your skill set and confidence should determine your shooting distance and it will very between individuals, of that their is no doubt.