Thread: Advice Needed: Choosing Caliber for Open Tops Hunting

308 all the way for that sort of range
firstly ammo is inexpensive (well compared to others)
ammo is available in all places unlike wildcat calibres
you can load tiny little 120gr thu to 240 gr. in the old days 45gr sabot loads were awesome till princess happyteeth made them illegal
drop curve is sort of similar to 22lr for cheap practice. ok not perfectly but will get you on the right track
plenty of rifles chambered in it

so guess you are on the right track. i have shot all my large game in nz with a 308, except a thar. that remains to be done.
no longer own a 308 though, as i went 7mmRM but thats a whole new ball game and a bloody expensive one