Antelope are tough to judge. Using the ear length is an OK general rule, but some bucks have lower prongs than others and the length of the ear varies, as does the length of the snout. The first thing I look at is mass as most good bucks won't get very far without it, especially in WY where they don't get Arizona tall. A side view is the best way to judge mass and I usually use they eye diameter comparison to the horn. A single eye width or just over the buck is skinny. Approaching double eye width at the base and you're getting into 6-7 inch bases, which is where you want to be. Horn length is tricky also. Bucks without a lot of curl tend to look longer than bucks with more curl when many times the reverse is true. Look for a buck with good hooks. Prongs are sometimes tricky as well. Many bucks appearing to have long prongs have skinny horns making the prong look longer. A skinny buck with 4-5 inch prongs can look impressive at first glance. Conversely, a buck with good mass can have the same length prong buck not look nearly as impressive. And, antelope come in all shapes and sizes, rarely having a good balance of everything in mass, length, and prong. Picture a buck with modest 14" horns, a 5-6 inch prong, 6" on the first and second circumferences and respectable mass above the prong, say 4" on the 3rd and 2.5-3" on the 4th and you have a high 70's to 80" buck on your hands.
