During my years in a gunshop, on several occasions local / national events have triggered "panic" buying eposides.
The "buyers" fall into roughly fall into three groups:
Profiteers : You know (or should know) these guys.
"Regulars" : Buy what they are low on - or "need", but haven't bought because of monitary considerations.
People trying to buy salvation : True panic buying ; Demand purchase - against council ( "No Mam, I don't I woulden't recomend a .25 auto as your primary defefsive tool" , "No sir, I don't think that 350 Rem mag ammo would be a good barter currency", "I'm afraid, in good concince that you should not be making this purchase","No sir .38 super will not fit your 38 special) ,buy every thing in sight, that has any hope of firing a cartridge, or the cartridge firing in their gun.
In the situation that you outline, you may have a slight advantage, by the ownership of an unusual caliber firearm, it would be a slim one, if ITSHTF, mabe a day or two.
YMMV, just my obv.
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Never been lost, But I've been "Powerfull confused"