Ludicrous Bowman
Also known as Ludicrous Archer.
Kingdom Law states: Given by the Crown to those who are exemplary in the art of archery.
The OP description states: Ludicrous Bowman is the highest attainable rank in target archery, having the name because it had been thought to be unreachable until it was proven otherwise. This is a rank that is recognized in all kingdoms and is the only rank which gets recognized in Royal court (due to the rarity of it being achieved).
The description on Poore House states: Technically not an award, Ludicrous Bowman is instead an earned rank in target archery achieved by attaining an average annual Royal Round score of 120+.
In the SCA we shoot Royal Rounds which are comprised of 6 arrows shot at each of 40, 30, and 20 yards followed by a 30 second timed round at 20 yards. When you have shot 3 Royal Rounds, on 3 different days, they become your average. At succeeding events or practices you can raise your average.
Along with your average comes a rank:
0-39 Novice archer
40-59 Archer
60-79 Bowman
80-99 Master bowman
100-119 Grandmaster bowman
And seeing as no one could possibly hit 120 as that would be "ludicrous".
120-139 Ludicrous bowman
140+ no name yet but will need one very soon as we are getting archers hitting 140 and higher.
Listing of those that have been recognized as a Ludicrous Bowman