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Precision Shooting 1-Part 2: Optics, Data and Logic

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Unread 05-20-2011, 08:52 PM
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Join Date: Jan 2011
Posts: 109
Re: Precision Shooting 1-Part 2: Optics, Data and Logic

Ward: I greatly appreciate your articles. They are clear and well written. I would like to know if there is more written about the "shadow effect." I have not been able to find other written accounts of this effect and I am interested in the details of how it comes about. Again, thank you for the excellent articles.
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Unread 05-31-2011, 08:05 PM
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Join Date: May 2011
Location: In a Free State
Posts: 187
Re: Precision Shooting 1-Part 2: Optics, Data and Logic

I just put a Mark 4 on my 308 and began learning how to calculate all these bit of info into one set of adjustments on my scope.

Great article and great info. Sounds overwelming at this point because it's all new info. Hopefully once I learn to use the scope with my load data I can do most of this in my head and leave only the wind to my full attention at the time of the shot.

Now I have to buy a chrony and get serious as there is no way I can shoot at sea level, and hunt at 8k+ feet for deer without using a quality balistics program with accurate FPS reading for my specific load.

Thanks for the article.
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Unread 12-16-2012, 12:52 PM
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Join Date: May 2004
Location: Kewanee il
Posts: 33
Re: Precision Shooting 1-Part 2: Optics, Data and Logic

Thanks for a well written and very informative piece! As a Coyote hunter I was aware of the temp effect on trajectory but never could figure why the gun shot a little high/low/left/right on different days different times, until I read in the article about light bending effect of scopes. A lot of my long time shooting buddies, some in their seventies have always remarked" leave it alone it will be ok when the light changes" never knew why--they just knew.
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Unread 12-17-2012, 12:28 AM
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Join Date: Dec 2012
Posts: 4
Re: Precision Shooting 1-Part 2: Optics, Data and Logic

Thanks for the information there was alot of info I had to save it so I can read it thoroughly later, I had no idea about light affect on scopes that could explain why sometimes im dead on at my 600 yard plate then I just have no idea where im shooting sometimes, my range is very difficult because its flater than flat stanley.
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Unread 04-14-2013, 07:03 AM
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Join Date: Feb 2013
Location: London
Posts: 189
Re: Precision Shooting 1-Part 2: Optics, Data and Logic

Very weldone Ward, that is a great Post indeed Sir,

Theres a couple of things that I would like to know? One was the Wind Chart made for a differant rifle than the .308 as used in the Math Example

And 2, Why on the wind chart where it said use half values and the full value was IE:- 4.5 the half value about it was stated as 2.0 and not 2.250 meaning 8 clicks instead of 9 because at a 1000yards that will be off 2.5" and the only reason I ask this is because the software that I am using has the wind correction feature but if I do the Math on a .308 at 1000yds that would be 10x10 devided by 11= 9.0909090MOA, But when my program does it, IT comes out 8.5 which would then place my shot 5" off, so then I cheated and adjusted the figures by instead of deviding by 11, I devided it by 11.8 and then it was closer, As wth the 700yds that works out perfect but seeing as you use the same figure to devide the 800yds I think this might be more of an issue for the very Long Range Shooters, But not for Hunters who keep the distance down to under 500yds,

When I did the Math on 1000yds with a 20mph wind like the one on the chart my software said the L to R was 17.0 MOA but again when I did the Math it came out at 18.18 which will put me off by 11.8 inches, So what would be the correct thing to do in this situation ???? maybe change the 17.0 to 17.6 as a Rough halfway point between the Two, I dont know,

Ward, again thanks for A Terrific Post

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