Can anyone tell how much is Hatcher rating of .32 Long cartridge ?

Discussion in 'General Handgun Discussion' started by sharpshooterbjp, Jul 19, 2012.

  1. sharpshooterbjp

    sharpshooterbjp New Member

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    Can anyone tell how much is Hatcher rating of .32 Long cartridge ?
     
  2. c3shooter

    c3shooter Administrator Staff Member

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    Just my opinion- there are more accurate predictors NOW about the relative effectiveness of a cartridge than Hatcher. HOWEVER- you did not ask that. Pull up the ballistics for the round you are looking at, and use this:

    The original formula was:

    RSP = MB * A * F

    where

    RSP = Relative Stopping Power Index
    MB = Momentum of the bullet in pound feet - (WB/450240) * V
    (If you know the kinetic energy and the velocity you can divide the KE by the velocity to get the momentum.)
    A = Area of the bullet in in2
    F = Form factor derived from the chart below.

    Bullet Type "F" / Bullet Type "F"
    Fully Jacketed Pointed .7 / Lead Flat Point (Large Flat) 1.1

    Fully Jacketed Round Nose .9 / Jacketed Softpoint
    (unexpanded) 1 - 1.1

    Fully Jacketed Flat Point 1.05 / Jacketed Softpoint
    (expanded) 1.35

    Fully Jacketed Flat Point (Large flat) 1.1 - 1.2 / Lead Semi-wadcutter 1.25

    Lead Round Nose 1 / Hollow Point (unexpanded) 1.1

    Lead Flat Point 1.05 / Hollow Point (expanded) 1.35
     

  3. sharpshooterbjp

    sharpshooterbjp New Member

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    Thanks a lot friend. Also Pls tell Me about better systems than Hatcher's.