I was just saying that it's worded wrong. "The actual distance to the target" is the actual distance to the target, not to the horizontal intersection of the target plane.
And as I said, it's putting fake ranging data into your dope sheet to estimate holdunder.
It's not a new idea, & I think it's been pretty much discredited for airgun ranges/velocities.
But hey... I dry fire twice with a regged gun after filling 'cause it makes me feel better, so you do what you gotta do.