As Mom knows full well (because being a good boy I told her) the "Super-X rounds" to which I referred are actually .22 caliber long rifle cartridges and I can buy three boxes of 500 each with the gift card my staff gave me as a Christmas gift expressly "to buy ammunition" with. They also gave me a silk tie with "cowboy guns" on it.

So I'm glad that I'm not a girl on a date with Amos, who doesn't know a condom from a cartridge!

Amos, a condom is a rubbery sort of thing and a generally comes in two pieces stuck together and it can go "BANG!" and looks kinda like this:
____ _
|____|_> only it's round and and in three dimensions.

If you found a cartridge you'd better take it to Mom or me or someone who knows about such things because you're too young. Also a condom, but not if it's all icky and not in the package.