Similar BCs but different weight and/or caliber

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Dave King, May 9, 2001.

  1. Dave King

    Dave King Well-Known Member

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    It's my understanding that if you launch two bullets at the same velocity and those two bullets share a common BC they will have very similar drop and wind drift characteristics regardless of the bullet weight and caliber differences.

    More graphically, a 55 grain .223 bullet with a BC of .300 and a 250 grain .338 caliber bullet with a BC of .300 both launched at 3000 fps will have nearly identical drop and wind deflection characteristics.

    Is this essentially true?
     
  2. Warren Jensen

    Warren Jensen Well-Known Member

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    Dave,

    Yes, it is essentially true. Ballistically speaking they will have identical drop and drift. In practice they will present slightly different cross-sections to the wind, or a different sail, and the actual drift is likely to be slightly different.
     

  3. Dave King

    Dave King Well-Known Member

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    Warren

    Thanks for the reply.

    I didn't give much thought to the sail area concept in wind drift so thanks for the new additional info.