What part of the cartridge does the firing pin strike to ignite the powder?

• A. Powder
• B. Primer
• C. Bullet
• D. Case

Answer: (B)

When a cartridge is fired, the firing pin causes ignition by striking the primer located in the base of the case. The primer contains a tiny explosive that detonates when hit, sending a flame into the main powder charge. This flame ignites the powder, rapidly producing high-pressure gas that pushes the bullet out of the case and down the barrel. The powder is the propellant, and the bullet is the projectile; the case simply holds everything together.