Alway baffles me how many suggest a 3-9X.
Why slum a 6x or 9X on an antelope rifle?
Because you have already killed many antelope with a 6X or a 3-9X, and don't want the extra weight, bulk, blocky lines and length that usually go along with variables maxing in the teens
Killing antelope and mule deer with a 6X, or 3-9X scope is not hard; killing elk with them is even easier