View Full Version : Aim Higher or Lower when uphill or downhill.

Flux Capacitor
10-09-2007, 6:00 AM
I am confused. I get conflicting information on what how wether to aim higher or lower when shooting downhill or uphill. It seems counter intutative. Can anyone give me some advise?

10-09-2007, 6:09 AM
Always lower.

The distance that the bullet is affected by gravity is shorter than the line of sight.

Here's the dope:
http://images.search.yahoo.com/search/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fs earch%2Fimages%3Fei%3DUTF-8%26p%3Dshooting%2520uphill%2520or%2520downhill%26 fr2%3Dtab-web%26fr%3Dyfp-t-501-s&w=386&h=532&imgurl=www.loadammo.com%2FTopics%2Fapril04-1.gif&rurl=http%3A%2F%2Fwww.loadammo.com%2FTopics%2FApri l04.htm&size=15.8kB&name=april04-1.gif&p=shooting+uphill+or+downhill&type=gif&no=2&tt=17&oid=2ca7ef7011663352&ei=UTF-8

10-09-2007, 8:14 AM
lower for both circumstances.

10-09-2007, 8:50 AM
lower for both circumstances.

thats what i remember

10-09-2007, 2:42 PM
This would explain why I missed the first shot that I took at my buck!

10-09-2007, 2:59 PM
The 'distance over ground' is the range scaled by cosine of the angle offset from horizontal.

Cos(x) is positive for barrels angled either uphill or downhill, thus the correction is the same direction in either case.

If you're shooting at a target 500yds away up or down a hill at 30 degree angle from horizontal, take your 500yd range and scale it by cos(30)=0.8660254.

Easy number here is 87% => 435yds effective distance.