Good as Gold. Popular cartridges such as the pictured .223 Rem, 9mm, 5.56 NATO and a number of hunting calibers are tough to find due to shortages of components used to make them and heightened demand, both resulting from recent pandemic conditions. Simonson Photo. By Nick Simonson What outdoor product has a higher hold rating than Bitcoin? What is getting pricier than a 1960s-era Mickey Mantle baseball card as collectors take stock of their youth-based memorabilia? What is seeing a run unlike anything we’ve recently witnessed, beyond perhaps Charmin and Cottonelle last March? The answer to all three of these questions is ammunition; and that is due to a number of factors tied to the ongoing pandemic.