lonegunman has it nailed
Yes, this has been a thread topic several times before.
As I did before, I must again weigh in for the .22 mag.
The 22 mag is adequate for deer (as poachers have proven).
And the .22 LR is adequate for people (as execution squads have proven)
Thus with the initial post conditions of
"You can have one rifle (not shotgun) and all the ammo you can tote. You will have to fend totally for yourself, including finding food, and fending off man and beast. "
As to the latter conditions, a wise brain can be more effective than a rifle in preventing the worst of those situations and even there a .22 mag could be adequate if appended to a decent intellect. As to the first condition I'm assuming you may be limited to "all the ammo you can tote". This argues heavily against the .223 or any centerfire with heavy brass.
20 rounds of 55 grain American Eagle .223 weighs 232 grams (278g w/box)
20 rounds of 55 grain Remington UMC .223 weighs 229 grams (271g w/box)
50 rounds of 50 grain Federal .22 mag weighs 236 grams (284g w/box)
50 rounds of 40 grain Winchester .22 mag weighs 210 grams (220g w/box)
50 rounds of 40 grain Aguila .22 LR weighs 168 grams (184g w/box)
The box of .223 occupies 270cc of space, the .22 mag measures 153 cc though they could be tightly packed like a box of Wolf 7.62x39
20 rounds of 122 grain Wolf 7.62 x 39 weighs 328 grams(336 g w/box)
and only occupies 135 cc of space - HALF that of the fancy boxes.
Soooo...
Six pounds of ammo without their fancy boxes would be:
240 rounds of 55 grain .223 or
580 rounds of 50 grain .22 mag or
650 rounds of 40 grain .22 mag
800 rounds of 40 grain .22 LR
But if you instead tote .223 reloading supplies to reuse that heavy brass.
(but how much does a simple reloader weigh? And the hassle in the field?)
Then again, the .22 conversion for the .223 rifle may be just the ticket
IF it is reasonably accurate with .22 LR.
Is there a .22 mag conversion?
Just what are the
exact diameters of .22 LR, .22 mag, and .223?
If you're depending on finding more ammo - .22 LR and .223 would be best. But if your limited to what you can tote and still have an adequate hunting round then 22 mag is the best.
As to the rifle for .22mag
- either my bolt action Mossberg or my semi-auto Marlin. If I had to grab one or the other, it'd be the latter cuz I've scoped it (now if I could find hi-cap mags for it;-)