220 & 240 MKs in the 300 mags Velocitys?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Bob Metcalf, Mar 18, 2002.

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  1. Bob Metcalf

    Bob Metcalf Member

    Dec 20, 2001
    What kind of velocitys can you expect in
    the various 300s with 220 & 240 MKs?

    300 Rum with a 26" barrel
    300 Win Mag with a 26" barrel
    300 WSM with a 24" barrel
  2. Boyd Heaton

    Boyd Heaton Well-Known Member

    May 14, 2001
    Bob,I have ran a 220 in my RUM(26") to 3100fps.But that was A VERY HOT LOAD.The load I shoot out of it in warm weather give's me 3058 with no sign's of pressure.I would expect around 2900 to 2950 with the 240's.The only other 300 I've really worked with is the Weatherby.And we could get 2800+ with the 220 in a Rem 700 with a 24" barrel.I only saw one wsm in action and he was getting mid 3100's with a 165.Which pretty well matches the WIN MAG in velocity.But I'm not sure what it would do with that long a bullet.Might take up to much powder cap.