What notable trait regarding headgear does the Pronghorn share with deer, separating it from true antelopes?

Answer

It sheds its outer horn sheath every year

The Pronghorn sheds its outer horn sheath annually, similar to how deer shed their antlers, although the bony core remains attached.

What notable trait regarding headgear does the Pronghorn share with deer, separating it from true antelopes?
mammalwildliferuminantherbivoreantelope