Hi Keith,

The rules on scoring read as follows.

"6. For all sanctioned I.B.O. Shooting events, the scoring must be as follows:

11 – Small circle centered within the ten ring. Approximately 25% of the ten ring will be used. Arrow must at least touch the circle. This score would reflect 11 on the scorecard.
10 – Circle inside vital area. Arrow must at least touch circle.
8 – Vital area other than the 10 point circle. Arrow must at least touch the vital area line.
5 – Remainder of the animal touching body color.
0 - A hit in the horn or hoof not touching body color, any other miss, or glance off"

For the complete set of rules visit this IBO website.

http://www.ibo.net/rules/

gg