Sighting for 100 yds

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I'm having trouble sighting my #4 for 100yds (local range).  I have a milled ladder sight, which only goes down to 200 plus a couple unmarked clicks (150?)I suppose I should look into getting a taller front sight.  Has anybody done this, and knows which size is correct to mount on the nose?

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trimix Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: December 30 2012 Location: Nanoose Bay, BC Status: Offline Points: 33	Post Options Post Reply Quote trimix Report Post Thanks(0) Quote Reply Topic: Sighting for 100 yds Posted: February 02 2013 at 9:31pm
	I'm having trouble sighting my #4 for 100yds (local range). I have a milled ladder sight, which only goes down to 200 plus a couple unmarked clicks (150?) I suppose I should look into getting a taller front sight. Has anybody done this, and knows which size is correct to mount on the nose?
	yeah...whatever.

Shamu Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Logo Designer / Donating Member Joined: April 25 2007 Location: MD, USA. Status: Offline Points: 20510	Post Options Post Reply Quote Shamu Report Post Thanks(0) Quote Reply Posted: February 03 2013 at 12:57am
	Its an individual rifle tuning thing, so, unfortunately the "right" one is unique to each rifle. However each 0.015" change in front sight height gives a 2" shift in poi @ 100 yds, so you can sort it out by shooting a 3 round group very carefully with the sights set to "2". Plot the center of the 3-shot group, then take away the 2 1/4" change for 100~200yds, add what's left & divide by 2. The answer is the number of 0.015" increments of the front sight you need.
	Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)