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  1. #31
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    Quote Originally Posted by greif View Post
    Actually there were 4 different HC shells used with the 7,5 cm Kwk:
    1- the early 7,5 cm Gr 38 Hl (with short cap);
    2- the 7,5 cm Gr 38 Hl/A (with short cap);
    3- the 7,5 cm Gr 38 Hl/B;
    4- the 7,5 cm Gr 38 Hl/C.

    The difference between 1- and 2- was only internal.
    greif what about the driving bands? Were all Hl 38 A/B/C projectales used with a KPS skirt band?

  2. #32
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    I don't really know, but I have never seen a Hl/C with KPS driving bands.

  3. #33
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    There also trials with KPS shells & short cap like IGr38 & IGr38 Hl/A but cap made from steel instead of zinc. It must be around 1938-40

  4. #34
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    Pics now...

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  6. #35
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    Quote Originally Posted by greif View Post
    Actually there were 4 different HC shells used with the 7,5 cm Kwk:
    1- the early 7,5 cm Gr 38 Hl (with short cap);
    2- the 7,5 cm Gr 38 Hl/A (with short cap);
    3- the 7,5 cm Gr 38 Hl/B;
    4- the 7,5 cm Gr 38 Hl/C.

    The difference between 1- and 2- was only internal.
    Is this design progression the same for ALL 75mm hollow charge shells (infantry guns, anti-tank, kwk 38/40/42 etc)?

    1) HL = short nose, "U" cup shaped liner cavity, flash tube from fuze through liner
    2) HL/A = short nose, funnel shaped liner, no flash tube above liner
    3) HL/B = longer stand-off nose, funnel shaped liner
    4) HL/C = longer stand-off nose, funnel shaped liner, funnel shaped washer in front of the cone

    For the 105mm HL rounds Ian Hogg showed them as below, which means that the 105mm HL would have had a completely different development cycle and the suffix a different meaning than for the 75mm. Or was Ian Hogg incorrect?
    I would have thought what works best in 75 would also work best in 105.

    hl 001.jpg

 

 
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