The only problem with this is how do you determine a 'winner'. You can't go by rack size because some of us are only limited to shooting doe (PA early ML season). You could go by weight. Then have a scoring system like:
Sidelock users (open sights): 5 pts for every yd over 50 yds
Sidelock (scoped): 3 pts for every yd over 50 yds
in line users: 1 pt for every yd over 50 yds.
This would put the sidelockers on a more even plane than someone who can shoot 150 yds with a scoped inline.