300 RUM

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by c east, May 29, 2002.

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  1. c east

    c east Well-Known Member

    Jan 2, 2002
    Need to know Max lenght Useing The 240 gr MK
    Also Case head size...Im useing A P-14...Do the Mag and action need to be opened up.....Any disavantage to opening it up?....Don't mind deep seating..200MKs but hate to do it on the 220s and 240s