The Duncan Device is a pellet holder for your offhand stand that lets you arrange the pellets in the shape of your 10 bull target. You can number the stickers in the sequence recommended by your coach to maximize your NPA (Natural Point of Aim). It was developed by nationally recognized youth shooting coach Jack Duncan.  The originals were of  cast green plastic with a wood backing for durability.  Stickers were included to number in the arrangement best suited for you.

We no longer sell this product, however, it is a great idea and could be adapted as a do-it-yourself project