What is the most important factor in choosing the correct ammunition for your firearm?

Choosing the correct ammunition for your firearm is crucial for both safety and functionality. The caliber or gauge is the measurement used to determine the size of the bullet or shot, and it must match your firearm in order to be effective and safe. Price and brand may be important factors in choosing ammunition, but they should never take precedence over selecting the correct caliber or gauge for your firearm. Additionally, the color of the ammunition box has no bearing on the quality or compatibility of the ammunition with your firearm.