Shooting a .22 RF is great and easy practice for offhand shooting skills. Even an air rifle.

Of course also with the rifle intended for the actual hunt. Different weight, sighting, trigger, stock shape etc plus recoil and report.

Many years ago a deer hunting club introduced a 200 to 250 yard off hand deer target. Ridiculous! By year two and three lots of people could make killing shots on the target. On a live animal I think such a shot on an unwounded beast would be irresponsible however.