After SOME thought, and I need to do a lot more thinking on this, I THINK in a bug out situation I would take the following firearms.

My Beretta 9mm PX4 and Beretta 9mm CX4 Carbine AND my Weatherby Assault Shotgun for our HFTH (Head For The Hills) guns. Both Berettas use the same 20 round magazines, of which I have a few. I based these choices on my thinking of self defense, which is good. BUT in a prolonged "Bug Out" situation, where they COULD possibly be needed, perhaps even more useful would be the lowly 22 rimfire. There isn't a critter around here worth eating that you couldn't kill with a 22. Might take several shots, but you COULD do it (thinking hard to kill hogs here, deer not so hard).

All I can say is IF it ever comes to it, that we can drive the 10 miles or so to our destination. I would sure hate to "Shanks' Mare" it all the way carrying a ton of stuff.