We've done it with averages and gave birds, but now we use a simpler "Lewis" Method... based upon actual birds shot. Basically we take the High or High + RU (depending upon the actual number of entries) out of the mix and then split the remaining bodies among a series of classes (4-5... AA,A,B,C,D).
If there is a tie at a class break point, we'll adjust as necessary.
Been using it for the past few years for 16, doubles and handicap. We've shot teams, but more recently we've stayed with individual events.
When we had teams, we used a draft system among the named captains... I gave a value based upon the suspected class of the shooter (4/A, 3/B, 2/C, 1/D) and the captains could pick anyone they wanted on their team. After each round, the lowest value team got first pick in the next round. Had the names projected on a wall, announced the teams and gave the captains a time limit - ala the NBA/NFL - was a lot of fun doing that in and of itself!
Hope some of the above helped!
regards to all,