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Thread: 20 x 110 Brass

  1. 14-12-2023, 19:58 #1
    Dick
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    Default 20 x 110 Brass

    I have a fired 20 x 110 case. It is 25mm dia at the head, 24.5 at the shoulder and 110mm long. Looks like a 30-06 on steroids except that the neck is short, only 11.5mm long. That might account from the appearance that it was heavily crimped ie not enough neck tension without a stiff crimp. Headstamp is RG 51 20mm. 51 Probably means made in 1951. Could RG mean Radway Green? On the side of the case just above the extractor groove is stamped SWN/141P/52/SAP12Z. Can anyone decipher?
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  2. 14-12-2023, 20:49 #2
    Pirate
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    Default Re: 20 x 110 Brass

    20mm Oerlikon

    I've got 4, and at a whim put one next to an empty 9.3x62... the 20mm looks just like a scaled-up copy of the latter.
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  3. 14-12-2023, 21:46 #3
    Pirate
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    Default Re: 20 x 110 Brass

    So google tells me I'm wrong, its 20x110 (as you indicated( Hispano, not 20mm Oerlikon.

    Mine has similar markings as yours, with a 53 on. Will check them all under good light tomorrow.
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