Antelope trophy quality can be really tough to judge for newcomers. The difference between a really mediocre buck and a trophy is just a few inches. So I recommend spending some time looking at pictures, and figuring out how to field judge horn size. Where the prong is in relation to the ear, how much curl (curl adds a lot of length, even though sometimes the tall bucks with little curl will look larger), stuff like that. Also see what size of bucks come out of your area and plan accordingly. If you’re in a region that produces a decent number of B&C bucks, shooting a 13” antelope the first day would be a real shame, especially with 15 years of point accumulation. But whatever, you’ll probably blow the cape all to hell with your ubermagnum anyway.