It seems most praises the .22LR as perfect for shtf. Light weight, light and inexpensive ammo and so on. So is there any need for a large bore rifle?
Of course there is a need for larger caliber weapons because the 22LR is a small game/practice round only. It is not a true "survival" round as it is not effective on humans or medium/large sized game. If it is a you have than I guess its better than nothing but I could not imagine limiting myself like that when there are so many better options available.I was thinking more if you have limitation about how much you can carry.
I do own a 45/70 and while I would never feel under powered with it, I have to agree that a good 12 ga is the closest thing to a "perfect" survival weapon you can get. It can kill anything a 22lr can and everything it can't. The funny thing is on a box of federal 45/70 ammo it says it can be used for "varmint" such as a prairie dogs and other small varmints.I don't own a .45/70 but something about the cartridge intrigues me especially in a single shot platform, I just haven't bought one yet.
Don't know that I'd call a .45/70 the perfect SHTF gun but the same can be said about the .22lr, I could use a 12 gauge and cover both of those caliber uses rather nicely.