Which type of stoppage occurs when two rounds are stuck in the receiver?

A double feed occurs when two cartridges are present in the chamber or action of a firearm at the same time, preventing the weapon from functioning properly. This type of stoppage can happen when a round is being fed into the chamber and another round is simultaneously being fed into the receiver from the magazine. As a result, the firearm cannot properly chamber either round, causing a jam.

Understanding the mechanics of a double feed is essential for proper troubleshooting and immediate corrective action during a qualification practice or real-world scenario. It helps shooters recognize the need for immediate intervention to clear the stoppage, typically by locking the bolt back, removing the magazine, and inspecting the chamber to ensure that both rounds are cleared.