Founder's Ranch is closed, but only the rifle and pistol bays; the shotgun area is still open. In their newsletter, they claimed that this was "a business decision that will allow Founder's Ranch to remain central New Mexico's premier shooting sports facility". I emailed them and asked them how closing would enable them to remain the premier facility. They never responded. By the way, Founder's Ranch is SASS's home range. Their HQ building, which you can see from I-40 has been for sale as long as I've been living out here.
Also, I think Bighorn is the one in the Torrance county park.