In my humble opinion most bows today only need one pin when hunting whitetail. They shoot relatively flat out to 25 yards.

I have one pin which I set at 20 yards when practicing and siting in. Even back to 30 yards it is dead nuts without compensation, and I do not have one of the new really fast bows.

Take if for what it is worth.

"Kill'em and Grill'em"
By The Nug (aka Ted Nugent)