You know your hoarder when your family & friends place reservations to show up at your place when things get bad.
If they can't bring guns & ammo then Toilet Paper, food, meds, supplies, anything to hunker down & defend.
But you see I look at things a little different.
I have pistol/carbine combos for 357/38, 44mag/spl, 9mm, 45acp, 5.56 & 22LR, L, mag calibers using the same mags except revolvers / lever guns.
Close range 12 gauge (56 round bandoleers)
Distance guns in 5.56, 270 Win, 308.
That way as you make your way to a safe place or place to place you can pick up ammo along the way & have the guns to use as needed.
Unfortunately you know that there will be low life human beings that will be selfish, cruel, self centered only thinking of themselves instead of building a better society after the chaos that has us either getting along or annihilation of humanity as we know it. You know what to do with these people, take their ammo & guns the only way these people would treat you!