searching by caliber on the auction side
There are so many revolvers listed on the auction side chambered in .38 Special but listed as .38 S&W. It's also very frustrating that sellers can choose .22 WMR or .22 Mag and these show as separate results.
I used to recruit for the NRA until they sold us down the river (again!) in Heller v. DC. See my auctions (if any) under username henryreilly