Could ammo serve as a medium of barter?

From Lew Rockwell.com

For some reason, our fiat tokens are still being mistaken for real money. And yet, I haven’t seen .357 Magnum on the shelves in the last 12 months. Maybe that’s why it’s already happening: Ammunition is being used for barter.

-How does ammo compare with money?
-How does ammo compare with other barter items?
-What supply and demand Factors are unique to ammunition?
-Which cartridges are best?
-How much is enough?
-What about reloading?
-Is it legal

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