A multiple bore electromagnetic projectile launcher is provided with series circuit elements connected to the muzzle end of conductive rails of a bore to continue current conduction in those rails following the launch of a projectile and during the launch of a successive projectile. This current flow augments the flux in the successive bore during the launching of a successive projectile. Individual firing switches can be provided for each bore or additional conductive rails can be provided in an automatic switching arrangement to conduct current from a muzzle of a fired bore to the breech of a successive bore.
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