I would have used a 9.3x62 or 9.3x74R, loaded with TUG or Norma Oryx.
In Europe the 9.3x62 comes in handy short rifles "battue" or "stutzen", from manufactors like Zoli 1900, Blaser R93 and Schultz & Larsen.

For driven hunts a see-thru-sights (with red/white "posts") or a red-point scope 1.5x. would allow the use of both eyes and scan the back-grnd at the same time.

Tuzi R.