303,

Yes, I would use a 303 on Light - Medium Plains game
as long as the rifle was set up for it (ie Scope) and I was using
a suitable bullet - 174gn PP or 215gn RN from Woodleigh or some
other similar quality bullet.

However personally I am not a fan of the 303 but that's not to
say that it can't do what any other 30 cal rifle can do.

Just my HO.

500 Nitro