Subsonic Ammo and Milldots
A Most Useful Subsonic Tool!
If your rifle is zeroed for high velocity at 100 yards and has an optic with a Mil-Dot reticle, use the 3rd Mil-dot down as an aimpoint at 50 yards, and the fourth Mil-dot down for an aiming point at 100 yards for our subsonic ammunition.
This gives you a quick, tactical "aim-shoot" solution for most situations you will encounter without having to fuss with your scope.
This differs somewhat from platform to platform, but once you get used to your gun/scope, it will be within an inch of spot-on.