Abstract: The magazine-loading device is designed for loading fin-stabilized projectiles or shells into the barrels of grenade launchers. The magazine-loading device comprises a shell storage enclosure having an inclined elongated base designed for supporting a series of fin-stabilized shells in side-by-side relationship. A shell-receiving unit is located at the lower end of the base and is arranged to receive the lowermost shell of the series which is transferred by displacement means from the shell-receiving unit into the barrel of an adjacent grenade launcher. Releasable retaining means is arranged to retain the shells in position above the shell-receiving unit while a shell is being transferred and to release the shells allowing them to move downwardly with the lowermost shell entering the shell-receiving unit after the shell previously in the shell-receiving unit has been transferred to the grenade launcher barrel.