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# Ballistic software

#8
01-19-2004, 05:13 PM
 Bronze Member Join Date: Sep 2001 Location: San Jose, CA Posts: 66
Re: Ballistic software

Hunter,

Remember that there is a difference between drop and path. Drop, irrespective of shot direction, inclination or declination, is drop of the bullet due to gravity. For an average .308 Win., drop at 100 yards is around 2.5". In other words, for the amount of time that a .308 takes to reach the target, gravity will have pulled it down 2.5". Path, on the other hand, is the path that the bullet takes relative to the line of sight. So in order to get a bullet to hit at the point of aim at 100 yards, the shooter is going to have to shoot slightly high. The path of the bullet will be positive when it's above the line of sight, zero as it crosses the line of sight (i.e., what you are aiming at) and then become negative below the line of sight.

Your ballistics program should show you both drop (in positive numbers) and path (positive before your zero, negative after.)
__________________
Blaine Fields
Lex Talus Corporation
#9
05-12-2008, 05:24 PM
 Junior Member Join Date: Dec 2004 Posts: 9
nightforce program downhill shooting data input

When shooting downhill is it possible to input a negetive amount of angle in the nightforce program? For example if you are shooting at a 30deg downhill angle what would you input for data?
#10
05-12-2008, 07:06 PM
 Platinum Member Join Date: Feb 2005 Location: USA Posts: 2,599
Simply imput 30 degree angle as it makes no difference if the angle is up hill or downhil, because the correction is the same..
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range it,check the wind, dial in correction, aim and only one shot
#11
05-12-2008, 07:21 PM
 Platinum Member Join Date: Aug 2003 Location: NC, oceanfront Posts: 2,506
Couldn't prove it, but I think there is a difference in Up/Down angle shooting. Perhaps accounting for vertical velocity along the way...
#12
05-12-2008, 07:55 PM
 Platinum Member Join Date: Feb 2005 Location: USA Posts: 2,599
The Soft ware doesn't show any difference that I am aware of and I have been taught that the corrections are the same..
__________________
range it,check the wind, dial in correction, aim and only one shot
#13
05-12-2008, 09:43 PM
 Junior Member Join Date: Dec 2004 Posts: 9
uphill vs downhill correction

After looking at an angle cosine guage available from sniper tools they show the same angle cosine at positive or negative angle. seems to me it should be different but aparently is not

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