When I lived in CO, I belonged to the Ben Lomond Gun Club. They have a LARGE range out near Kiowa. Annual membership was reasonable ( 10 yrs ago was $85/ yr, plus an 8 hr work committment) Club used to sponsor a number of shoots of just about everything. They were alos the State Rifle Assoc. Run a Google search, and see what you get.
What we have heah is.... failure to communicate.