Just a note for those not overly familiar with the Western U.S. - there is a whole lot of perfectly legal target practice that does not take place on organized firing ranges.
People in many rural areas can fire on their own property, depending on local laws and regulations concerning proximity to buildings, property lines, municipal boundaries and such.
Many people use informal ranges on government owned land, such as National Forests, Bureau of Land Management Lands, or lands owned by state governments. (These places are usually a mess of old appliances used for target practice, broken glass and other trash - called "trigger trash"), but they are popular. The Federal land agencies, at least, often have little ability to manage these areas due to political factors.
In some places, the amount of gun use on government lands far outstrips the amount that happens in organized and permitted firing ranges - and this is perfectly legal (again, depending on the precise location and local regulations). Requiring people to only fire at ranges would be a HUGE change in use patterns.
I man, it may be possible, but it would be a very, very big change from the way things are now.