Wisconsin Hunter Safety Course


Always Match the Data Stamp First

All manufacturers use a data stampStamp on the firearm's barrel, and on the base of the ammunition indicating caliber or gauge. on their rifles and ammunition. On rifles it is usually located on the left or right side of the barrel. The caliberThe distance between opposite lands inside the barrel of a rifle or handgun. is also stamped on the cartridge base. The cartridge box indicates the caliber of the ammunition as well.


Understanding Caliber

In most cases, the distance between opposite landsThe ridges between grooves inside a rifled barrel. inside the barrel gives us the caliber of the rifle or handgunFirearm that is held in the hunter's hands (not braced against the shoulder) when fired.. Matching the data stamp on the barrel with the caliber on the cartridge base will ensure that the correct ammunition is used in your firearm.