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  1. #1
    Join Date
    12.07.2007
    Location
    Czech Republic
    Posts
    482

    Default 30mm BK 303 ammo

    The round is a 30x210 for the MK 303 Br canon for the type XXI submarine. One canon is in the military museum in Prague. Its barrel No. 100 is stamped 30mm Flak M 44 U (U for U-boot?) . The number built is 32 in 1944 and 190 in 1945. There was a zwilling submarine variant, a single mount for surface ships, a single towed ground variant (for these pictures exist) and supposedly there was a twin flak on Pz IV chassis. (source Strelecka revue 4/2007)
    The canon developed after WW2 into Czech 30mm PLDvK.

    The projectile has no markings and from what I could measure it corresponds with 3cm-M-Gesch.L’spur Üb.o.Zerl. Rotating band is steel. It was filled with orange clay-like substance (needed to measure the internal cavity),probably inert (still here ).
    The fuze is a AZ-1504A not the correct one. Should be zündererzatzstück
    The steel case was manufactured in Povazska Bystrica (dou on 9) in 1944 (on 3) the waffenamt is WaAA80.(on 4). 3-303St (on 6) and bzs. and 153 (on 12) probably give a model and lot.
    The round was used for PLDvK loading training mixed between newer czech rounds.

    I will be thankful for any information on the ammo for the BK 303.

    Nabob
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  2. #2
    Join Date
    12.07.2007
    Location
    Czech Republic
    Posts
    482

    Default

    I have found a projectile at the deposit of Military Historical institute that looks very much like the one on my round.
    On the third picture is the projo inserted to a post war case (2nd from left) together with post war inert round (left) and three Br 303 rounds.
    Regards, Bob
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