My experience with antelope is all over the charts. Perfectly killed and cared for crop eaters turned out yucky. Sage eater after a nasty run-n-gun was the best meat Ive had! My last one was a sage eater, killed in its bed, skinned and cooled on the spot. Excellent!
A couple people mentioned chewy ones...this is only a theory mind you, but Ive seen chewiness result from improper cooling, more than any other factor.

"...the left considers you vermin, and they'll kill you given the chance..." Bristoe