I was able to purchase this scope up for $30. Thinking of trying it out. However, it did not come with instructions. Does it work to the following general guideline
- Sight in at 20 yards.
- Move target to 40 yards and pick a spot at the top of the target and shoot using the 20 yard reticle. You will hit several inches low.
- Aim without an arrow using the 20 yard crosshair at the same target spot as before. Now turn the speed dial until the 40 yard reticle aligns to arrow you shot at 40 yards.