What ever the range is to the feeder. Mine is 18 yards.. Brain shots!!!!
I use the optimum zero function in Chairgun. For most of my rifles the near zero is around 20 yards and the far zero around 40 with a midrange height of 3/8". Basically, minute of a squirrels head from point-blank to 45 yards with no compensation required.
Don’t matter what speed, the ammo has a rainbow —> always set Zero top of rainbow to get the flattest trajectory.
Ernest
I zero so the "top of the rainbow" is 1/2 inch high. I do this since I hunt ground squirrels and rabbits, and the head is about an inch target, so I'm good from around 17 to 55 yards with a pellet speed around 900 fps. Most of my guns are zero'd at 50 yards, but some at 45 and a few at 40 yards. This is really only important if you are a "holdover" guy and not a "clicker"...