Steve,
Thanks for filling in the details. I remember being amazed watching that entire process leading up to Allen Currier's broadhead record. Ike shouting and angry about delays while Dan Perry & others helping with the string and other details so he could shoot the thing. I wonder what ever happened to Mr. Currier?
Joe,
The minimum arrow length allowed for primitive is 23". If you are going for a 50-lb & under draw weight class, then you have to go through a weigh-in process. The officials at the weigh-in area will take your longest arrow, and draw your bow just far enough that the point of the arrow starts to fall free from the shelf, if you have one, and they will take a draw weight reading. As long as it he draw weight is 50#, or less, then you are okay. If your bow doesn't have a shelf, then the bow will be drawn until the point of the arrow would start to drop free of the bow if it was turned horizontally, or approximately even with the belly side of the bows arrow pass. It is important to be aware of this so you don't find yourself having to cut down your arrows at the last minute. If you measure your maximum 24" draw from the back of the bow, then you will need to make sure your arrows are short enough that it passes the weigh-in process.
The weigh-in is always a bit tense for the primitive classes. Whoever is running the scales will need to be made aware that the primitive bows are held drawn for as little time as possible, and that the bow is not drawn past the draw weight cutoff.
If you are shooting in an unlimited weight class, then you can bypass the weigh-in process and shoot whatever length arrows you want.
Alan