What should be done before loading a shotgun?

Before loading a shotgun, it is crucial to match the gauge on the bottom of the shell to the shotgun's datastamp. Each shotgun is designed to fire specific gauge shells, and using the wrong gauge can lead to dangerous situations, including possible barrel obstructions, misfires, or even catastrophic failures that could result in injury. By ensuring that the gauge of the ammunition matches the specifications of the shotgun, you are taking a vital step in ensuring safe handling and operation of the firearm.

Checking the firing pin, ensuring that the safety mechanism is off, and inspecting the barrel for obstructions are all important safety checks to perform, but they do not specifically address the critical requirement of ensuring the correct ammunition is being used. Using the wrong gauge is a primary safety concern and is fundamental to safe shotgun operation.