Fieldmouse,
Please don't take this the wrong way- but we don't shoot the same bows, or the same arrows. Nor do I even know if we have the same draw length or if we're pulling the same poundage. Therefore, I feel pretty confident in saying that my arrows are traveling at a different FPS than yours.

If I want to know where my arrows will hit at 25 yards, I don't sight in from 10 feet away- I sight in from 25 yards away. When I hit the black dots on my Block target 3 times- then I know I've found my setting for that yardage. This does wonders for my confidence level when the moment of truth arrives as I'm not guessing about aiming 2 inches high or 2 inches low.

Thanks for the advice, but I'm going to stick to doing it the old fashioned way- the hard way....... the tried & true way.

Have a great upcoming season.

Rob