Since the OP specified an "old school" 3-gun battery I'd go pre-64 Winchesters in a:

- Model 52 Sporter (scoped 22 rimfire); a Model 70 carbine (pre-war 270 Win with G&H scope mount); and a Model 12 pump (12ga M choke).

These would cover all my bases in Montana, bunnies to bulls and turkey.