Need some figures run please

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by winmagman, Jul 25, 2004.

  1. winmagman

    winmagman Well-Known Member

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    I wonder if someone with a ballistics program could run some numbers for me.

    I'd like to know the approx. MV of a 140 gr. SMK over 46.0,48.0,and 50.0 grains of Re 22.

    6.5-284
    Lapua brass
    Fed 210 primers
    26" barrel

    Any help would be appreciated
    Chris
     
  2. Mikecr

    Mikecr Well-Known Member

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    Assuming your touching the lands, & bullet shank seated .26 into neck:
    48gr= 2720fps (~47kpsi)
    50gr= 2820fps (~51kpsi)
    52gr= 2920fps (~57kpsi)

    This from QuickLoad.
    SAAMI max =59kpsi
     

  3. winmagman

    winmagman Well-Known Member

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    Thanks Mikecr

    I'm actually .010 off the lands and quite a ways into the case neck. OAL is 2.965, 3.465 on a stoney point comparator. But at least I've got some ball park figures to start with.
    Thanks again
    Chris
     
  4. Mikecr

    Mikecr Well-Known Member

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    The reduced starting pressure offsets the reduced case capacity w/regard to pressures, and velocities should remain very close.