RE: Rules ?
A bounce back is an arrow that squarely strikes the target and bounces
back toward the shooter. An arrow that glances off the target is not considered a bounce back. A bounce back may be scored if the score can be agreed upon by the majority of archers in the group. If a member of the group other than the archer witnesses the bounce back and the group cannot agree, the archer may re-shoot the target before the group advances to score the target.
Hope this helps, Chris