Martinhunter , antelope are pretty tough to judge . Antelope up in Montana and Wyoming are a slight bit bigger in body/head size than down here in NM and AZ . The average ear on the antelope here are about 6 in and up in Wy I think the average is about 7.5 . If you get to really glass and study a buck you can use his ear length to get an idea of his horn length , but as said above , mass really contibutes to B and C and Pand Y scores . Ive seen 15in bucks score 80-82 and 16 in bucks score 78-80 because lack of mass . Usually where you find one buck ,you'll find another and than another , good quality optics will help look over the differance in body size of older more mature bucks , but that doesn't neceserally(spelling) mean an older buck has bigger horn either. After looking over a few here and there , I videoed 10 different bucks last Aug. and it seemed that the bucks that had longer noses had alot more horn , but again that doesn't mean a whole lot unless you can get out and look them over untill you know which is which...Hope this helps , I absolutely love Speed Goats.....NMhuntnutt