Fluid transfer devices for use in manual cartridge filling procedures for filling cartridges with liquid drug dosages from medicament containing vials. The fluid transfer devices include a double ended main body having a longitudinal axis, a vial port for telescopic receiving a drug vial and a cartridge port for slidingly receiving a leading cartridge end. The cartridge port includes a cartridge securing arrangement for releasably securing a leading cartridge end therein and a cartridge ejection arrangement for at least partially ejecting a cartridge therefrom for assisting manual sliding ejection of a filled cartridge. The cartridge port can include either a combined cartridge securing and ejection arrangement or a discrete cartridge securing arrangement and a discrete cartridge ejection arrangement.