Then you need to post on here, or know and use chair gun yourself:
The pellets you are using,
The speed in feet per second that the gun is shooting them at,
The height of the scope center above the center of the barrel,
The magnification you have set the scope to (unless it's a first focal plane scope like from Falcon)
Then most of us could post up a graph for you.The more accurate the data, the better the graph.
If you don't know these values, or can't find out, then you will need to do the real world shooting.
when I'm shooting at the club and want targets out at differen