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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2011 at 13:24
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Optics GrassHopper
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Question, with a 100 yd zero, and we are 3' low at 300 yds why do we calculate 3 x 3 MOA's or 12/4's to = 3 inches if
1 MOA at 300 yds is supposed to =1 inch  @ 300 yds.
If we adjust 12/4's are we not adjusting 9" with a FFP zero of + 6" into the bulls eye???
Where am I going wrong in my thinking????
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2011 at 13:42
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1 MOA at 300 yards = 3.14 in at 300 yards...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2011 at 15:13
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Optics GrassHopper
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Thanks Kickboxer I thought I was correct, but the info in a significant post had the expample of using 12/4's or 3 MOA's; and as I suspected it would have raised the poi 9 inches. (BTW if your moniker KB'r is true, just for kicks and giggles (no pun intended) my uncle used to be a profesisonal heavy weight prize fighter back in the 50's from Portland Ore. Used to fight under the name Tiger Maxson; 50 pro fights 25 KO's 25 TKO's). 
Thanks again KB'r and any others who might respond later. Your a fine group of people here.
Send-it!
Doug
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2011 at 15:46
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And Kickboxer is one of the best of the best.
Here is how I figure it, and it's rounded off. A MOA=1 inch at 100yds, 2 inchs at 200yds, 3 inches at 300yds, etc.. It's close enough for me and I don't get a headach worrying about the fractions. Ahhh, that's not true either since most scopes that are graduated in MOAs move 1/4 MOA with each click. So 1/4 MOA is 1/2 inch at 200yds, 3/4 inch at 300yds, 1 inch at 400yds, etc. Now my head is starting to hurt, and I haven't even touched on the scopes that move 1/3 MOA with each clickWhacko 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2011 at 16:42
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Your question is exactly why I love mils: no inches, just mils.  You can do the same with MOA: stop thinking in inches, adjust based on mils (if reticle is in mils and turrets are in mils.)

KB is right, it is only 1/4 inch per click at 100, 1/2 inch per click at 200, 3/4 inch per click at 300, 1 inch at 400...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2011 at 06:36
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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I do the same as Rancid, but I do it with moa. I don't think in inches, I think in moa, but I have an moa reticle, and moa turrets.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2011 at 09:01
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When dealing with a scope that has MOA turrets I have to think in terms of inches and yards in relation to the target. If shooting at a target 600yds away and your impact is 1 foot to the right, that is: 12"/6=2MOA, Simple hillbilly mathBucky Now if it was 550 yards, my head would start to hurt again. Thank goodness for Mil reticles and Mil turretsBig Smile
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2011 at 09:46
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What if the number of feet or yards off target isn't known?


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2011 at 11:08
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Originally posted by Rancid Coolaid Rancid Coolaid wrote:

What if the number of feet or yards off target isn't known?


 It usually isn't known exactly. Unless I'm shooting on a known range and or target and don't have a range finder of some sort. I have to depend on range estimation (which I was pretty good at, at one time), and I'm usually pretty close. Mind you, targets are defined as inanimate objects and not game animals. Sorta like the Mil dots without the dots; I missed buy that far on one side so I'll aim by that far on the other (Kentucky windage). I'm talking about a scope with just cross hairs and MOA turrets.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/19/2011 at 18:59
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Optics Apprentice
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Originally posted by Rancid Coolaid Rancid Coolaid wrote:

What if the number of feet or yards off target isn't known?


 

That is where is where a great spotter comes into play.  For the style of shooting that I do, I was taught a simple solution.  If you missed by a little left or right, up or down, you would adjust the opposite direction by 2 minutes (E-Type silhouette steel target, 20" wide, 40" tall).  The rational was, for example, if you missed about 6 inches left of the target at 600 meters, a 2 minute correction right would put you 6 inches on the plate (12" right at that distance) .  Same thing if you missed just under the target.  Just adjust 2 minutes up.  This is ideal for the type of shooting I do.  It may not work well for target shooting, or going for points, but it certainly worked well for a rapid follow-up shot to get a hit on the plate.  Again, your spotter was worth their wieght in gold for unknown distance calculation assistance and wind calls in that style of shooting.  Just my two cents worth. 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/19/2011 at 19:07
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FWIW, I was taught on MOA, so I feel more comfortable with that system.  Had I been "raised" on mils, I would feel the same towards it.  I guess I have MOA on the brain now!
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