front sight height question

varian

October 28, 2016 18:35

on a rifle is moving the height of the front sight by a given amount the same as moving the height of the rear sight by the same amount. is it a one for one ratio

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  Hawk Carse

  October 28, 2016 18:43

  Yes, but in the opposite sense.
  A taller front will lower the point of impact.

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  nononsense

  October 29, 2016 05:22

  vsrisn,
  
  Exactly, they are opposite of one another.
  
  Here are a couple of methods to use for the calculation:
  
  http://www.brownells.com/GunTech/Sight_Height_Calculator/detail.htm?lid=13186
  
  https://dawsonprecision.com/sight-calculator/
  
  http://ameriglo.com/pages/sight-calculator
  
  Best.

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  Kenneth Stuart

  October 29, 2016 11:31

  Think "Front sight follows the bullet impact" - so if bullet impacts higher than point of aim (POA) raise the front sight (or if bullets impacts lower than POA lower the front sight).
  
  Exactly, how much raising/lowering dy can be determined by
  
  dy/(rear to front sight separation) = dx(impact relative to POI separation)/(range distance)

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  varian

  October 29, 2016 14:54

  thanks all. i have the direction thing down, i was just wondering about if it is a 1:1 ratio. thanks again.

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