Here Here! At least in Texas this is easy to do. I have
1 30-06
1 .357
1 .45
and many rounds of ammo in my cache.
No problem with that assortment at all. But you'd do well to include a 12-gauge shotgun as well. You may at some future time find it helpful to be able to equip another less well-prepared than yourself who could be helpful in all sorts of ways, ranging from surprising those who think they're dealing with you alone, or standing guard while you sleep...sometimes. And at other times can provide covering fire or backup for your sentry.
Besides, should anything critical in your rifle break or it otherwise falls hors de combat it'd be helpful to have a spare long gun upon which you could fall back to as a spare. Or two. Or three.
I believe a .22 conversion kit for the .45 might well be a useful accessory as well. Large quantities of .22 ammunition are both compact and relatively inexpensive, and the muzzle flash and sound signature is less overpowering at night.
