Calibers is a rip off honestly and most of the time pretty crowded. Just about the only decent public range is the city run shooting park (probably the one you're talking about by double eagle). If you do happen to have a truck or 4wd vehicle, you could go out to the mesa and shoot there too. Drive like you're going to the range by double eagle, but after you make your right turn on paseo del vulcan from the off ramp, take your immediate left (instead of straight) which should be a frontage road going west. Drive 5-6 miles until you get to the cattle crossing on your left that goes underneath I-40 and drive under it. Pick one of of the trails and go about a half mile south until you get to the big ditch (you'll know) and enjoy.