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338-300 RUM Improved

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by 7ultra, Sep 27, 2004.

  1. Sep 27, 2004 #1
    7ultra

    7ultra Well-Known Member

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    Does anybody know if there are reamers and dies out currently for a 338-300 RUM with an improved shoulder of, lets say 35-40 degrees. I know you can find 338-300 dies pretty readily, just wondering if anyone has any experience with an improved version. Any suggestions?
     
  2. Sep 27, 2004 #2
    Mysticplayer

    Mysticplayer Well-Known Member

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    A gunsmith with a last name of Romain is building something just like that and calling it the 338 Tomahawk.

    My version is called the 338 Mystic. I used a 338 RUM AI reamer run deeper for the 300RUM case. Then the throat is custom cut to meet my bullet needs.

    You can get the same reamer I used from MidwayUSA but you will need to get a throated to seat the 300gr MK out where they belong.

    Jerry
     
  3. Sep 27, 2004 #3
    sniper2

    sniper2 Well-Known Member

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    You can get C-H to make the dies.
     
  4. Sep 28, 2004 #4
    7ultra

    7ultra Well-Known Member

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    Just out of curiosity, whats the case capacity of your 338 Mystic compared to a normal 338 RUM?
     
  5. Nov 1, 2009 #5
    redriderXXX

    redriderXXX New Member

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    I don't know if you are still interested or not, I just had a gun built and it would seem to be very similar to the 338 Mystic. It is chambered for a 300rum necked up to 338. Fireforming gives it a 40degree shoulder and it's capacity is 117.5gr water compared to113.5 gr water in the unformed case with the 30degree shoulder.
    I have the reamer which has one chambering on it and Neil Jones will be making the dies based on my fired cases.