Ladder tested 300 win mag/240MK's and Retumbo

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by BountyHunter, Mar 17, 2003.

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  1. BountyHunter

    BountyHunter Well-Known Member

    Jun 13, 2007
    Re: Ladder tested 300 win mag/240MK\'s and Retumbo

    Work some 5 shot loads up in that range, play with seating and see what she does. Think you will find that it shortens the tuning process.

  2. moosehunter

    moosehunter Well-Known Member

    Mar 19, 2002
    Ladder tested 300 win mag/240MK\'s and Retumbo

    Loaded 20rds starting at 73grs. Went up .3 at a time. Quite a horizontal spread at 200m spread was 6". The 10th,11th,12th,and 13th. tucked into .380moa so I gues thats my "sweet spot"? The 14th climbed high and left and the 15th blew the primer so I stopped there. Not to much for pressure sign before that though. A bit of flattening and slight cratering. Federal Match primers. Win brass. I guess this is how its done?