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yardedge subtrac for angle

 
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  #1  
Old 07-15-2010, 06:49 PM
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yardedge subtrac for angle

new to longrange hunting. ? on how much yardedge do you subtrac for shooting up or down for every degree
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Old 07-22-2010, 04:45 PM
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Re: yardedge subtrac for angle

Quote:
Originally Posted by seriousscout View Post
new to longrange hunting. ? on how much yardedge do you subtrac for shooting up or down for every degree
Put an angle cosine indicator on your rifle and simply multiply by the straight line value of your range finder.
Google "angle cosine indicator" and surf away.
There is also a lot of info on this site by using the "Search" tab above.
Dave
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Old 07-22-2010, 05:01 PM
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Re: yardedge subtrac for angle

Don't subtract yardage, multiply the drop for the yardage by the cosine of the angle.

eg a 10 degree shot. cos 10 = 0.984

if your drop is 13.5 MOA then the drop is 13.5 x 0.984 = 13.28 MOA


Read this thread Up/Downhill corrections
Stu.

Last edited by kiwi3006; 07-22-2010 at 05:23 PM.
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Old 07-22-2010, 05:40 PM
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Re: yardedge subtrac for angle

Quote:
Originally Posted by kiwi3006 View Post
Don't subtract yardage, multiply the drop for the yardage by the cosine of the angle.

eg a 10 degree shot. cos 10 = 0.984

if your drop is 13.5 MOA then the drop is 13.5 x 0.984 = 13.28 MOA


Read this thread Up/Downhill corrections
Stu.
Multiplying the yardage will get you close, within .25 MOA. But you are CORRECT, multiplying the drop is the correct way to do it, easier too.
Dave
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  #5  
Old 07-22-2010, 08:31 PM
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Re: yardedge subtrac for angle

kiwi3006 and Dirtball are correct!

That's why turrets marked in yards are a spot of bother. They make for seemingly simple adjustments for angle but without the proper placement of the correction in the shooting equation the farther the shot the farther you'll be off.

Unless the range finder does the correct angle calculation and presents the result in the appropriate unit of distance.
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  #6  
Old 07-22-2010, 11:57 PM
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Re: yardedge subtrac for angle

Read about all three methods on post #13 on this link:

Long Range Tricks And Toys By Ian McMurchy
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