Feeding is placing a cartridge in the chamber of the barrel. For magazine-fed guns, feeding is usually a single linear motion of pushing the round from the magazine lips up a short ramp and into the chamber.
For belt-fed guns the cartridge usually needs to be withdrawn rearward from the belt then pushed forward into the chamber. In belt-fed guns with no separate drive motor for the belt, the feed mechanism must also advance the belt one position per cycle. In magazine guns, the magazine spring advances the cartridges.
Next Section: Obturating (Locking)