Sorry, nope can't do it.
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NAA.
Agreed.
One rifle would be woefully inadequate. Ideally would have:
.17 HMR heavy barrel - gophers at medium range
.22 LR hunting rifle - pests and small game
.22 LR match target rifle - heavy target rifle to compete
.22 magnum and/or Hornet - pests and larger small game in relatively populated farm country
.223 Rem target rifle - predators and centerfire practice
.270 Win - longer range light to large game (companion to .30-06 in case one or the other breaks on a hunt)
7mm-08 - less recoil in a very light mountain rifle
.30-06 - heavy game and standard weight target rifle
.308 heavy barrel target rifle for long range target shooting
.338 Win Mag - longer range heavy game and bears
.375 H&H magnum - bears on up to Africa (high recoil makes the 7mm-08 and .270 better for smaller stuff)
.50 caliber black powder - black powder/shotgun areas
20 gauge rifled slug shotgun - black powder/shotgun areas
Also shotguns:
20 gauge - upland game
12 gauge - ducks
12 gauge double - skeet and trap
That's 13 rifles at a bare minimum, and we haven't even touched a lever gun or backpacking rifle. Sweet sixteen including the smoothbores. Please stop the one gun insanity.
If pushed into a corner for hunting rifles:
.22 LR
.22 Magnum
.223 Rem
.270 Win / .30-06 combo
.375 H&H
That's six rifles at barest minimum to cover hunting purposes, losing out on the 2 target rifles, 1 rifled shotgun / 1 black powder and 1 mountain rifle.