HansGruber
Ronin
Muzzle energy is not the end-all, be-all measure of a caliber's effectiveness.
I have killed 400+ pound sows with a .22LR; one shot, bang, dead. A 9mm or 556 wouldn’t have done the job better...just messier.
When it comes to a survival gun, weight is going to be everything. 500 rounds of .22LR is going to go a lot farther than a comparable weight of 9mm or 556; let alone the fact that the platform that shoots it will almost certainly be lighter as well.
I have killed 400+ pound sows with a .22LR; one shot, bang, dead. A 9mm or 556 wouldn’t have done the job better...just messier.
When it comes to a survival gun, weight is going to be everything. 500 rounds of .22LR is going to go a lot farther than a comparable weight of 9mm or 556; let alone the fact that the platform that shoots it will almost certainly be lighter as well.