I use a 3 pin, 10-20 pin, 30 pin, and a 40 yard pin.used the 40 for the first time this year on a doe, slight quartering away, ran 50 yards and piled up.red pin is the 40, red will be the first color to "disappear" in low light. Gets rid of any temptation if you can't see the pin.what ever you choose shoot it alot to get used to your site. Have someone set up targets at different yardages and you work on judging the distant and picking the right pin. Have fun with it.