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Extreme Long Range Hunting & Shooting (ELR) Over 1,000 Yds.


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Spin drift and Coriolis at 1000+

 
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  #22  
Old 10-19-2012, 10:05 AM
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Re: Spin drift and Coriolis at 1000+

So if I understand this properly, you add sd to a left wind and you subtract it from a right wind?
thx
Elmer
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  #23  
Old 10-19-2012, 10:06 AM
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Re: Spin drift and Coriolis at 1000+

Quote:
Originally Posted by elmerdeer View Post
So if I understand this properly, you add sd to a left wind and you subtract it from a right wind?
thx
Elmer
Correct.

Jeff
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  #24  
Old 10-19-2012, 11:32 AM
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Re: Spin drift and Coriolis at 1000+

Would be nice to have left twist barrels to offset some of the CE, but then if we did that; we'd probably need left thread actions too.......last thing we need is the barrel backing out of the action when it torques from bullet launch.
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  #25  
Old 05-26-2013, 06:26 PM
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Re: Spin drift and Coriolis at 1000+

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Originally Posted by Broz View Post
But I only employ the coriolis to be part of shots beyond 1200 yards as the effects are usually small before that.
Jeff
So, at 800-1000 yards, you would not worry about SD and coriolis?

I ask because I just set up a range for 1100 yards and it is 208 degrees SW. I've only shot at 606 yards and I want to do all the work possible before I jump to 800 (then 1000 yards). I'm not finding a lot of material on the subject and this video has me concerned for 1,000 yards.

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  #26  
Old 05-26-2013, 08:11 PM
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Re: Spin drift and Coriolis at 1000+

So what would be "just" the Coriolis effect if the target is North or South at 1000 yds?
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  #27  
Old 06-08-2013, 03:45 PM
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Re: Spin drift and Coriolis at 1000+

I was tinkering around with my shooter app today...punching in different senarieos.

300 gr Hybrid at 1500 yards...49th paralell shooting 4 diff directions with zero wind. All other parametes the same. Dialups as follows...

shooting at 0 Degrees (north) 113.7 up, .9 left
90 degrees...(east) 112.7 up .9 left
180 degrees (south) 113.7 up .9 left
270 degrees (west) 114.7 up .9 left


So this thing is telling me that in an east west situation I don't have any hoazontal (windage) coriolis?? Zero effect no matter which direction i shoot!!!!

That can't be right. I have to assume that the .9 is the spin drift...which should remain constant at a givin distance. I have the coriolis box checked on the app...I triple checked that.

What gives???
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  #28  
Old 06-08-2013, 08:28 PM
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Re: Spin drift and Coriolis at 1000+

Agree with what Broz says. Typically depending on rifle and BC etc at 1000 yds with a right twist barrel the poi is 6" right and north or south adds 3" right so for my poi for my .375 /408 hunting rifle I set it up to shoot about 1 moa left at 300 yds. When you get out to 2000 yds you have to correct more. For shooting east poi is higher and west lower. Think of it as shooting from on a giant spinning giant globe.
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