Trying to find case dimensions for ultra mags

Discussion in 'The Basics, Starting Out' started by trader388, Jun 3, 2004.

  1. trader388

    trader388 Well-Known Member

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    Does anyone know of a website that shows drawings of case dimensions for all the ultra mags ? Much thanks. [​IMG]
     
  2. jmden

    jmden Well-Known Member

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  3. jmden

    jmden Well-Known Member

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    It has data for all the RUMS and drawings for the 300 and 338 RUM, but not the 375.
     
  4. trader388

    trader388 Well-Known Member

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    site must be down [​IMG]

    Specifically what I am looking for is the rim sizes on 7rum 300 338 and 375.

    The data I have says the 300rum is .550. But 338 is .532. Somehow I don't think that is right. I think the 300rum is .532.
     
  5. jmden

    jmden Well-Known Member

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    That comma at the end of the address screwed it up...sorry. Just type in www.accuratepowder.com and go from there. .534 rim diameter is what it shows for the 300 and 338. My understanding is that the only difference in all for RUM offerings is the neck size and maybe a miniscule shoulder angle difference from caliber to caliber.
     
  6. D.P.

    D.P. Well-Known Member

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    Trader338
    The 300 and 338RUM are .534 I believe the others are the same. 300RUM case is 2.85" and the 338 is shortened to 2.76" the 338 Hart uses a 300RUM case and gives you the full length and 4 grains over the RUM. About another 100fps.