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Old 01-30-2013, 22:25   #24
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Location: Wichita, KS
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Originally Posted by TDC20 View Post
I looked at the "Mice" markings under magnification, and I think it says, in two different fonts, "M" and "H3". I think the big "M" is for Meprolight, and the "H3" is for tritium. I couldn't find my paperwork, either, but I don't think the screw on the left side needs to be turned.

You have the directions for the adjustments correct, I believe. Adjust the screw on the right side CCW for right, and CW for left.

I can't really tell you how many turns moves the impact at 25 yards, but I do have a little math that tells me for a G20 sight radius of 6.84" (measured mine with the Meprolights), to move one inch at 25 yards, you would need to move the rear sight by 0.0076". I hope that helps. It's been so long since I zeroed mine, and pretty much everything I shoot out of it uses the same zero, that I forgot what the adjustments were for 25yds.
I know that my old BoMar adjustables on my G20L were supposed to be 2/5ths of an inch (.4") for each click at 25y... Or very close. I would use that as a ball park figure. Hell, it might have been .4" @ 50y... Hmmmm
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