Exactly, they developed their own scoring system, the Buckmasters scoring system. If I'm not mistaken and someone correct me, it's identical to P&Y Gross score...no deductions giving the buck credit for all antler growth. It's called the Buckmasters scoring system.

Ah the power of the internet, instead of asking a question, why not look it up so I did. :

The philosophy of Buckmasters' new Full-Credit Scoring System is to measure and record whitetail deer antlers without forcing them to conform to a criterion of perfect symmetry. This Full-Credit Scoring System takes nothing away from the rack. It simply measures every inch of antler and classifies it accordingly. The Buckmasters system can be distinguished from other whitetail scoring systems in these nine important areas:

http://www.buckmasters.com/bm/Resources/BuckmastersTrophyRecords/tabid/156/articleType/CategoryView/categoryId/23/BTR-Philosophy.aspx