I'll try to make this short, I've read lots of posts on the basic firearms that everybody should own.. , The list can be as small as "Combat Rifle, Long Range Rifle, 12 Gauge Shotgun, and Combat Pistol" Or it could include "Compact pistol, Revolver in Magnum, rifle in .22, and pistol in .22". In my collection I one of each and doubled up to cover some extra calibers. So I have a combat rifle in 5.56 and 7.62x39 , and my Pistols in 9mm, .45 , And as of this Monday I finally found a .357 Magnum I liked enough to purchase. I like that I arguably have a firearm for any SHTF event I should be able to find ammo that at least ONE of my guns will shoot. Except I don't have a .40Cal. Considering that they are easy to find cheap (LEO Trade in G22 $350ish), should I just buck up and get one when I have the money? or can I let that one slide by? I feel like there could be a random day where .40 Cal is available but 9mm or ,45 is not because of some shortage or whatever reason. I guess this comes down to.. is .40 useless with everything else I have?