Rampart is an okay place to go only as long as you're about the only person there...I've gone up there before to shoot, saw the crowds and left, I won't take my chances up there with all the yahoos.
Dragon Mans is also okay I guess...I know a lot of people that refuse to go there for lots of reasons....but just for popping off a few rounds it's probably a fine place. I've only been there twice though.
Whistling Pines is probably hands down the bestest & nicest place....but you have to be a member and it's PRICEY....I've never shot there, just toured the facility.
Cactus Flats in Penrose is a nice range also....though I've only been there twice too, both times with a CCW class.
I know I wasn't much help....but around the Springs to find a decent place to shoot you'd probably have to have a friend with some land either up the mountains or out east.