The B&C system works for me, although I'm not a fanatic on this issue. I do think spread should be a component of the system, but I can see an argument against the B&C deduction system.

Personally, I've always thought the serious shortfall of the B&C system is how it deals with mass. It really shortchanges mass for deer and elk, but oddly, for antelope it just about makes mass the whole ballgame. (I shot an antelope a couple years ago that I knew was good, but I had backpacked him out 3 miles to the car before I began to realize I had a B&C contender. He was super massive but just barely 14" long.)

My own wildcard system would be simple water-displacement. How many cubic inches of volume does the rack possess, that's the whole system. (Of course that still leaves out spread, so I'm going to stick with B&C for now.) Maybe we could add some mass measures to the B&C system. How about measuring circumference of the G1, G2, G3 ...