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Ian, I need your help, please?

 
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  #1  
Old 10-05-2004, 05:15 PM
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Join Date: Mar 2002
Location: Georgia
Posts: 106
Ian, I need your help, please?

Hello Ian or any one else experienced in this area.
In need of a devise to give the correct angle of shot from a level position to be able to take to the Rockies and be spot on.
Also in need of some percentages and or formulas to figure with the info. the devise gives to subtract from my initial MOA come-ups for the different yardages.
Leaving on the 12th of this month, so don`t have much time to get myself prepared.
Did my question make sense or clear as mud? I`ve seen where some of you have covered some of this if not all in times past, but can`t remember really that much about it.
thanks in advance, Warren
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  #2  
Old 10-05-2004, 05:17 PM
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Re: Ian, I need your help, please?

Warren, you need an Angle Cosine Indicator. a few places have them, badger Ord has em and a mount.
Pete
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  #3  
Old 10-05-2004, 07:29 PM
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Join Date: Mar 2002
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Re: Ian, I need your help, please?

Pete, is the ACI unit accurate out to 1500yds?
Thanks for responding, Warren
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  #4  
Old 10-05-2004, 08:03 PM
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Join Date: May 2001
Location: Sask. Canada
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Re: Ian, I need your help, please?

Warren,
Check out this website, he is the man.
www.snipertools.com
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  #5  
Old 10-05-2004, 09:34 PM
 
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Re: Ian, I need your help, please?

Warren Barret-- There is a great post about shooting at inclination angles at the below link.
http://artactical.com/eve/ubb.x?a=tp...05&m=859609536

The angle cosin indicator does not work at long range and has no chance of getting you the correct answer at 1500 yards.

The guy at snipertools.com claimed in the thread on A.R. Tactical that special forces use his product. I can tell you that I was just at Fort Polk, Louisiana, where the Joint Readiness Training Center is located (JRTC) and not one single sniper involved in the training from 5th Group or Delta had a Angle Cosin Indicator on their rifle or in their gear. I asked every sniper there that we worked with if they had one, or used one. None of the Urban snipers at Shugart Gordon Center used them either. If you want to learn the right way to shoot at angles learn it from a Pro who can teach it and do it. The method S1 uses works at Ultra Long range, and it is the method the guys that do it for a living use.

I know the moderators get aggravated when guys tell the truth, but try both methods past 800 yards, and you will see who is telling the truth. The ACI is a gadget and the method that proposed with it does not work in the world of long range shooting. Anyone who has actually tried it knows it produces the wrong answer.
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  #6  
Old 10-06-2004, 01:22 AM
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Join Date: Oct 2003
Location: Randolph
Posts: 57
Re: Ian, I need your help, please?

The cosine indicator would work good with an accurate printed agnle compensation (as in the one Exbal produces with Excel) chart if it showed you the angle instead of the angle indicator. Does anyone know if there is something like this that shows the agnle. If not, how do you accurately (and quickly) determine your anlge?
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  #7  
Old 10-06-2004, 05:55 AM
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Join Date: May 2001
Posts: 2,369
Re: Ian, I need your help, please?

Antslayer is correct in that there are several methods of "doing" inclined fire. Here's an article that's pretty good and explains some models very well.
http://www.exteriorballistics.com/eb.../article1.html

What it pretty much boils down to is how large is your target area (kill zone), what is the distance (shorter is more forgiving) and what is the angle (less is more forgiving). If you're talking rather short distances and a large target area (many inches) and moderate angles (NOT 90 degrees for sure) you be fine with the old(er) but tried and true COS(Angle) * base/gravity distance version (the ACI type model). If you're talking precision fire onto a small target at longggg range the more accurate methods could be better.

IMHO for hunting purposes using the ACI or MilDot Master device and their COS(angle)* base distance is good enough and to use the the other "more correct/accurate" models amounts to just buffing a turd, the critter will be dead in all cases.
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