.300 Wby

Discussion in 'Long Range Hunting & Shooting' started by DANTEC, Sep 20, 2002.

  1. DANTEC

    DANTEC Well-Known Member

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  2. meathead

    meathead Well-Known Member

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    Try looking it up in a reloading manual. You do know what a reloading manual is, don't you [​IMG]
     

  3. Nighthawk

    Nighthawk Well-Known Member

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    Yes I do know what a reloading manual is but I don't have one that lists the 220 MK for the 300.
     
  4. texas

    texas Well-Known Member

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    Let me know how you come out and if there are any improvements to be made.
     
  5. Nighthawk

    Nighthawk Well-Known Member

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    Texas, is your post for me?
     
  6. texas

    texas Well-Known Member

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    Yes, it is. I'm waiting for a Rem 700 in 300Wby to com in now.
     
  7. meathead

    meathead Well-Known Member

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    The Sierra 50th Anniversary Edition lists several powders, but IMR-4350 looks the best to them, with 65.9 grs. as a start with 72.8 grs. listed as max. They say 2800 fps with max out of a Mark V w/26" barrel. Oh, the OAL listed is 3.560" It is right there with the good old standby, the 300 Winchester Magnum!! [​IMG]
     
  8. Nighthawk

    Nighthawk Well-Known Member

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    I'm going shooting tomorrow and I'm looking for load data for the .300 Wby Mag using a 220 MK. The two powders I have a re RL25 and H870. How many grains should I start out with?
    Thanks
     
  9. Nighthawk

    Nighthawk Well-Known Member

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    I didn't get out to the range today but I will try again as soon as possible. I remember the last time I was using my dad's .300 (not mine) and I belive we were getting half inch groups at 100 yards. I can't remember what bullets we were using though.
     
  10. JoeR

    JoeR New Member

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    Nighthawk, if you go to the Sierra website, they list a number where you can call one of their ballistic consultants who will be happy to give you all the info you need. For example, they gave me great info for using Retumbo powder with 7mm MK's when even Hodgdon could offer no data.
     
  11. texas

    texas Well-Known Member

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    Nighthawk if you still need added info on this check out the bullet,barrel section do a search "220MK loads for 300 Wby.