Calculating charge for different bullet weight

Discussion in 'Reloading' started by JDMontana, Feb 4, 2012.

  1. JDMontana

    JDMontana Member

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    Mar 27, 2011
    Shooting a 500 A-square and all the reloading data is for 600 grain bullets. Will be shooting a 570 grain bullet instead. Does anyone having reloading data or is there a scientific method of calcualting theortical charges based on the reduced weight?gun)
     
  2. Grumulkin

    Grumulkin Well-Known Member

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    Dec 22, 2010
    Percentage wise, the difference between 570 and 600 grain bullets isn't much so you could start load workup in the upper part of the lower half of published date for 600 grain bullets as long as bullets are of similar construction.
     

  3. JDMontana

    JDMontana Member

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    Mar 27, 2011
    I was looking for a little more specific data. I dont want to shoot a bunch of rounds experimenting. looking for a safe load that will obtain 2400-2500 fps. A-square data for a 600 grain bullet is as follows:

    H-4895 106.0 Avg Velocity 2346fps
    H-4895 115.0 Avg Velocity 2474fps

    IMR-4064 112.0 Avg Velocity 2380fps
    IMR-4064 117.0 Avg Velocity 2503fps

    RL-15 113.0 Avg Velocity 2316fps
    RL-15 118.0 Avg Velocity 2467fps

     
  4. Mikecr

    Mikecr Well-Known Member

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    Aug 10, 2003
    You need 'QuickLoad'