Canadian Firearms Safety Course (CFSC) Practice Exam

The correct choice is to consult the data stamp on the barrel of your firearm to find the appropriate ammunition. The data stamp typically indicates the specific caliber and any other relevant details about the type of ammunition that can be safely and effectively used in that firearm. This information is crucial because using incorrect ammunition can lead to malfunctions or dangerous situations like misfires or even explosions.

While the owner's manual provides general safety and operational information, it may not always specify the exact ammunition or its specifications as clearly as the data stamp does. Additionally, the chamber length is important for ensuring the ammunition fits properly, but it should not be the sole reference for determining the correct cartridge. Lastly, the last recorded maintenance date is irrelevant when it comes to matching ammunition to the firearm, as it does not provide information about ammunition compatibility.