I have wind drift information for my load from a ballistics calculator. How do I convert inches of drift into scope adjustments, knowing that I have 1/4 moa clicks? For example if my 1000 yard drift is 106 inches how many clicks would I have to dial in? What is the "formula"
How do I convert windage
- Thread starter mshootnit
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1 MOA at 100 yards is 1.0476 inches. Add another 1.0476 inches for every additional 100 yards. At 300 yards, 1 MOA is 1.0476 X 3. at 1000 yards, 1 MOA is 10.476 inches. A scope with 1/4 MOA clicks will move the Point of Impact 1/4 of 1.0476 inches at 100 yards and 1/4 of 10.476 inches at 1000.
In rough terms, each click will move your Point of Impact 1/4 of an inch per 100 yards. That means 1/4 inch at 100, 3/4 inch at 300, and almost 3 inches at 1000
In rough terms, each click will move your Point of Impact 1/4 of an inch per 100 yards. That means 1/4 inch at 100, 3/4 inch at 300, and almost 3 inches at 1000
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Anybody want to confirm or share better data than this? (for .308 Federal Gold Medal 168gr Sierra match 2630 muzzle velocity out of a M14 22" barrel) sight height=2.125" ,crosswind 10mph, 220 yd zero
Drift 1/4 moa Click Adjust
300 yd 11
400 14
500 17
600 22
700 27
800 32
900 36
1000 42
Elevation
Dist Come up clk 1/4 moa clicks
300 9
400 22
500 37
600 54
700 74
800 96
900 122
1000 151
Drift 1/4 moa Click Adjust
300 yd 11
400 14
500 17
600 22
700 27
800 32
900 36
1000 42
Elevation
Dist Come up clk 1/4 moa clicks
300 9
400 22
500 37
600 54
700 74
800 96
900 122
1000 151
Art Eatman
Moderator In Memoriam
Looks like Post #3 has it. Quck'n'dirty, round numbers, four clicks is one inch at 100, so it's ten inches at 1,000 yards. Ten times as much. 40 clicks is 100 inches at 1,000 yards. Okay, so to get a tad more accurate in all this, 40 clicks would be 104.76 inches.
Don't worry about that other inch-and-a-quarter; the wind's gonna change, anyway.
Don't worry about that other inch-and-a-quarter; the wind's gonna change, anyway.
Uncle Mike
Member
To figure Turret Adjustment Value...The amount the reticle moves, per click, at a certain yardage is as follows:
Your scope says...1/4"@100y per click
.250" X yardage = Amount reticle moves at that yardage.
ie... .250" X 7 (for 700 yards) = 1.75" (1 3/4")
Each click of your turret adjustment dial will move the point of impact 1 3/4" at 700 yards.
.250" X 9 (for 900 yards) = 2.25" (2 1/4")
Each click of your turret adjustment dial will move the point of impact 2 1/4" at 900 yards.
Your scope says...1/4"@100y per click
.250" X yardage = Amount reticle moves at that yardage.
ie... .250" X 7 (for 700 yards) = 1.75" (1 3/4")
Each click of your turret adjustment dial will move the point of impact 1 3/4" at 700 yards.
.250" X 9 (for 900 yards) = 2.25" (2 1/4")
Each click of your turret adjustment dial will move the point of impact 2 1/4" at 900 yards.
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