The only rifle range I'm aware of south of Calgary is the one I belong to ...the Shepard Range (C&DTSA). Our range is located just outside the S.E. corner of Calgary. Here's the link to our website; http://www.cdtsa.org/
Also a CDTSA member. Love it - not cheap, but close to home and the best part is that almost every member I've met has been really safety conscious and nice to talk to. It's a bit restrictive on bringing guests as well, but no complaints here.