i sight in all my rifles at 25 yards. for larger calibers, a 25 yard zero is the same as a 200 yard zero, in general. most of my harvests are around 25 to 35 yards for all game. i dont have many set ups that are long shots.
Nikon has a chart that lists alot of info on such. It is called spoton..or spot on. It lists most ammo !! To me, tbe ammo you are shooting makes a big difference. I have found that when I find a ammo the rifle "likes", I stick with it ! I have found my 10-22s like CCI standard velocity, while my bolt rifles will shoot the high velocity stuff ok. I didn't see anybody mention trying different types of rounds, but IMO, it does matter.
This is very roughly true but please, if you are an inexperienced hunter, at least shoot the rifle at 100 and 200 yards to see where it is hitting. A half inch error at 25 yards is much larger at 100 or 200.