Matching the Data Stamp
Always Match the Data Stamp First
All manufacturers use a data stamp on their rifles and ammunition. On rifles it is usually located on the left or right side of the barrel. The caliber is also stamped on the cartridge base. The cartridge box indicates the caliber of the ammunition as well.
Like rifles, shotguns have a data stamp usually located on the right or left side of the barrel. It indicates the gauge and maximum length of the shotshell that can be fired safely. Gauge and shell length are also shown on the shell base and box.
Click on the Animation below to see what shot shell should be used.