velocity of bullet

gunzforever

February 19, 2006 15:36

ok, could anyone possibley tell me the velocity of this bullet, here is the load. it is .308

40.0 grains of IMR3031
a cci large rifle primer
a Hornady soft point bullet (130 grain)
a 21 in barrle

Thanyou and Godbless

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  richbug

  February 19, 2006 17:44

  Best educated guess would be 2550-2600 fps.

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  bpost

  February 20, 2006 09:09

  If you look in your reloading manuals there is a list of velocities for each caliber that the load developed in a test barrel.
  
  If you subtract about 50-75 FPS for each inch of barrel loss it makes it easy to come up with a WAG on what your gun should be producing. But, without chronographing the load in your gun any guess could be off by a couple of hundred feet per second.
  
  Another way is to shoot it at 100 yards to ZERO the elevation. Then shoot it at two hundred yards to get the total bullet drop. By comparing the drop to the list in the book you can extrapolate the MV pretty close.

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  Cubslover

  February 20, 2006 10:28

  Quoted from IMR website
  http://www.imrpowder.com/data/rifle/308win-2005apr03.php
  
  Case: Winchester Barrel Length: 24"
  Twist: 1:12" Trim Length: 2.005"
  Primer: Federal 210M
  
  Bullet: 130gr SPR HP
  Powder: IMR3031
  
  Min Charge: 42.0
  Velocity: 2827
  Pressure: 42,600 PSI
  
  Max Charge: 46.7C
  Velocity: 3130
  Pressure: 59,800 PSI

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