ORIGINAL: PYbuckhunter
Here is Boone & Crockett's definition of a non-typical rack.....
Antlers that have at least one abnormal point. An abnormal point is any point that does not originate from the main beam in one of the normal (e.g., G1, G2, G3, etc.) antler tine locations.
this was my understanding and a "non typical point" isn't always easy to tell, based on the Beatty buck I believe that each point coming off the main beam has to be 100% uniquely attached to the main beam, so if they share even 1 mm of common attachment point, its non-typical.
Scoring a typical you deduct anything that isn't perfectly symmetrical, so if G2 on right is 12 inches and G2 on left is 12 4/8 inches, then you deduct teh 4/8 off the final score. They do 1/8 cause that's what measuring tapes have, never seen one with 1/10 inch marks.