Round File
I keep a round file just for that purpose. It has one main compartment, it is green and made of plastic. Capacity is 35 gallons.
So, if I find a .25 Auto or 380 in with 9mm and 40SW, as I sort them. The odd, wrong calibers that I can not use, get methodically placed in the round file, filed under the empty frozen pizza box.
I like to wear gloves when doing this sorting and clean the cases I am keeping as soon as possible. The residues are toxic.
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