It's open on Sun, Wed, and Saturday 10AM-6PM, and Monday/Tuesday for Clays ONLY (IIRC).
I was there today at the 25 yd line... there are way too many blackpowder shooters smoking up the place.
Bolt guns galore, etc...
But for $5, it was a safe and clean environment to function test my AR-15 (finally got it to cycle Wolf).
The rifle range officer is a real nutjob - he likes to pack people together even though there are empty spots all over the place, and he yelled at me for switching spots because I didn't want to shoot next to a blackpowder gun. I've seen at least 4 other RO's at Bald Mountain and none of them ever gave me this much shit about spots... They will keep reminding you about single load only, etc...
Their intercom system is busted so just keep an eye on what everyone else is doing and you'll be fine.
Don't cross the yellow line after a cease fire, so when he calls 1 shot to cease fire, stop! Open your action (lock the bolt open on the AR-15), grab your staple gun and targets and stand behind the yellow line twiddling your thumbs for his ass to come over and inspect every rifle.