243 vs 260 S.D. or Velocity rules?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Mr Humble, May 19, 2009.

  1. Mr Humble

    Mr Humble Active Member

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    This question relates to Berger VLDs. I am being told that the highest BC 6mm Berger launched from a 243 Winchester will outrange, shoot flatter and be more accurate that the highest 6.5mm Berger (that has a higher BC) shot from a 260 Remington. Assume identical 26" barrel rifles with the proper twist for each bullet.
    I thought BC ruled but am I wrong? Thanks.
     
  2. Armed in Utah

    Armed in Utah Well-Known Member

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    Pic looks like a 695 Tikka ? In 6.5x55 ?

    Run a comparison on a ballistics chart...Real Guns.com has an easy one.......I have both a 6XC (27" Pac Nor) & 260 AI (28" Pac Nor) w/8 twists...with my experience with both the 107 SMK 6mm @ 2925 & the 6.5mm 142 SMK (595 BC) also at 2925 fps....the 260 AI is gonna be flatter/longer...
     

  3. Mr Humble

    Mr Humble Active Member

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    Thanks I thought a 6.5 would do better than a 243.

    It is a Tikka 595 Super Sporter (replaced by the SAKO TRG). They were made in lots of neat calibers not imported. All that was were 223, 22-250 & 308.
    In Europe there were 6.5x55, 7x64, 9.3x62 and probably more.
    How I got mine is a complex tale, but I got it.
     
  4. Mikecr

    Mikecr Well-Known Member

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    The caveat here resides in the fact that the 243/105 is potentially faster than a 260/140, given the same powder capacity. But not without a cost.
    And at some range, the slower 140 would catch and pass the 105.

    If you compared cartridges with similar capacity/bore ratios(producing same velocites) you would find the 140 leaving a 105 behind right from the git-go.
    But neither could be declared more accurate.