Cheapest Practice/Training available is .22LRTR.
Shoot .22 rimfire out to 300 yards once a month at Parma.
(.22 Long Rifle, no .22 magnums)
120 rounds scored per match
Check the Parma calendar
Only equipment upgrade people need generally is a scope with mil-dots and enough adjustment.
Wal-Mart has one for $69, Tasco has one for $75.
Other than that just need ammo.