"Range" between Rockwall and Quinlan on Hwy 276?

I've noticed that there is a range set up off the side of the road on Hwy 276 between Rockwall and Quinlan; actually closer to Quinlan. I've seen people out there shooting, but never thought to stop and talk to them. There's no building or gate. It's just off the side of the highway where they have built up an earth backdrop and set up paper targets. Does anyone have any information on this place?

Try to bump this again and see if anyone knows anything. I just drove by again last weekend and it looks like they have semi-permanent targets up now. No signs, no gate, no fence, nothing. Odd...