A device (1) for feeding medium-calibre ammunition, intended for a turret mounted on an armoured vehicle, characterised in that the structural elements for guided and pulled delivery successively comprise a first conveyor (31), a first ratchet casing (41), a second conveyor (32) and a second ratchet casing (42), said rotating circular plate and said structural elements for guided and pulled delivery all being covered with a protection made from metal sheet on the side faces of same and/or on a top portion or roof, said protection made from metal sheet having movable flaps mounted in a rotating or pivoting manner (23, 24, 28, 33, 34, 35), allowing partial or total ergonomic (re)loading and/or unloading of medium-calibre ammunition (2) into/from the rotating circular plate (21, 22), either when the vehicle is stationary or when it is moving, from the inside and/or the outside of the turret and access to the medium-calibre ammunition (2) or (re)loading and/or unloading of same into/from the conveyors (31, 32).