In a SHTF - I've always said one needs TWO guns. One 12g Shotgun, and a handgun - your choice semi or wheel gun. You really need two. But a wooden Mossberg 12g pump and Ruger
GP100 357 or a Remington Police 870 and G19 - doesn't matter. I'd feel very secure with either of those combos. But I'm really trying to stay home in SHTF, so I find the SG more useful overall.