Hi zac123
It is illlegal in IBO to judge yardage with set pins other than the ones you use to shoot with.I judge yardage several ways and most of the comments given to you already are very good suggestions.Most importantly is to get to a 3D range and look at all Mckenzy targets that are made.
somtimes i will step off a yard at a time with my eyes out to 10 or15 teen yards then eye from the target back to the 15 .And i will step off the shooting stake to get different looks at the animal from the side.
Small animals look farther away, bigger look closer .Also each class has a max distance so if in hunter class 35 yards is all the farther a target can be .Remember that !!!


shootem straight !!!!!!