The ban on USDA funded inspection of horse slaughterhouses has expired. Privately farmed horse meat could be processed, inspected, and sold if there was a slaughterhouse that worked in that medium.
Feral horses are still protected on federal land.
Probably the most effective thing hunters can currently do is take pictures of the damage feral horse overpopulation is doing to the landscape and other species and share those photos and explanations on social media. Then call your elected officials and tell them the BLM should have all options available for maintaining sustainable herd numbers. Return the management of wildlife to the States.