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MOA and dial spinning, need schooling. #14892361 05/19/20
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rickt300 Offline OP
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Correct me at any time if I am wrong. A 4 MOA gong at 200 yards would be 8"x8". Suppose I am sighted in for 300 yards and my bullet would hit 16 inches low at 400yards, to bring the bullet up the 16 inches I would turn the turret counter clockwise 16 clicks (1/4 MOA clicks) right? This said true MOA is a bit bigger than 1", 1.047 to be exact. Are the adjustments on scopes actual MOA or are they 1."? Or if I were trying to bring my POI up say 60 inches at 700 yards each click being approximately 1.75" I would need to turn the turret 34-35 clicks counter clockwise? The scope in question being a SWFA 10x42 Classic with MOA turrets.

Last edited by rickt300; 05/19/20.
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Re: MOA and dial spinning, need schooling. [Re: rickt300] #14892408 05/19/20
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NVhntr Offline
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You're on the right track but stop thinking clicks and start thinking MOA, like the numbers on your turret.


Steve
Re: MOA and dial spinning, need schooling. [Re: rickt300] #14892449 05/19/20
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Jordan Smith Offline
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The scope adjustments are supposed to be MOA, but that needs to be measured and confirmed. The biggest favor you can do for yourself is to get a SWFA 10x42 with matching MOA reticle and turret (or matching in MRAD), and simply use the reticle to measure how low your shot lands. Then dial this number into the turret. Given your current scope, you can use the mil-dot reticle to measure how low your shot is and multiply that by 3.438 to get the number of MOA to dial into the turret. If you insist on using inches (the most complicated and least effective way to do it), then you can take the distance of the POI from the POA, divide that by the distance in yards, times by 100, divide by 1.047, and dial that into your elevation turret.

If you need to come up 16" at 400 yards, then

16" / 400 * 100 / 1.047 = 3.82 MOA

So if your turret is set to "0" with your 300 yard zero, then simply dial up to 3.75 MOA ("3" plus 3 clicks).

If you need to come up 60" at 700 yards, then

60" / 700 * 100 / 1.047 = 8.19 MOA

So dial from "0" to 8.25 MOA ("8" plus 1 click).

Re: MOA and dial spinning, need schooling. [Re: rickt300] #14892829 05/19/20
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rickt300 Offline OP
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Cool thanks for the info.

Re: MOA and dial spinning, need schooling. [Re: rickt300] #14893363 05/19/20
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30338 Offline
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jbmballistics.com is a good place to get familiar with.

IC-A

Re: MOA and dial spinning, need schooling. [Re: rickt300] #14893859 05/19/20
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rickt300 Offline OP
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Excellent site!

Re: MOA and dial spinning, need schooling. [Re: rickt300] #14894727 05/20/20
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yobuck Offline
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Hold steady on the target, dial to the hit and shoot.

Re: MOA and dial spinning, need schooling. [Re: rickt300] #14901055 05/22/20
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Sharpsman Offline
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Much can be learned by reading!


"There ain't no freedom....without gunpowder!"
Re: MOA and dial spinning, need schooling. [Re: rickt300] #14907459 05/24/20
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rickt300 Offline OP
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Well done some reading, extrapolated some data and played with the scope now on a 243 to test it. I like the scope a lot other than it's weight and I need to get used to the windage knob sticking out so far to the right. All I need to so now is do some more load testing and head out to the range, hoping for first round hits out to 600 yards ( as long as there is lead in the air there's hope).


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