Where do you find the model and serial on a 22 long rifle ctg?

The model and serial number on a .22 Long Rifle cartridge (ctg) are typically found on the headstamp of the cartridge case. The headstamp is located at the base of the cartridge and usually includes the manufacturer's name, caliber designation, and sometimes the year of manufacture. If you're looking for this information on a firearm chambered for .22 Long Rifle, check the receiver or barrel, where these details are often engraved or stamped.