You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter J.G.W
- Start date

Help Support Long Range Hunting Forum

Fortunatly almost every new range finder does this for you.

For a longer shot with uphill/downhill angle an improved method is to multipy the cosine of the angle with the drop correction for the line of sight distance. The best approach is entering the angle into a ballistic calculator and coming up with a unique solution.

Thanks. The reason I ask is I set up a range close to my house on the weekend, there is some fall from bench to target and I was just curious as to what the effect would be. Fall is roughly 30 feet at 100 yards and 60 at 300. In reality when would you get a perfectly level shot at an animal anyway.......... never.

Last edited:

If you're trig fluent the answer is, multiply by angle cosine. Otherwise, look at an angle cosine indicator or protractor with cosine markings and you'll see. Depends on the AHR to the target but in general I don't account for slope until I'm past 10 degrees up or down angle unless the shot is REALLY long. By 20 degrees you're around the .90xAHR mark where I'd start making adjustments almost regardless of AHR.

Last edited:

The easiest and quickest way to figure how the angle affects the shot is to use a ballistics app on your phone. Shooter is great and inexpensive. Then you can calculate the shot in Shooter with

Then you will be able to use your fist in the field to quickly determine if you need to account for angle measurements.

Lots of things can alter that and it might vary from session to session. Up/down angles aren't much of an issue unless your shooting in steep mountainous terrain especially when hunting. Best solution is to practice shoot as much as possible so as to get a feel for what happens. By and large a slight hold change on the target will suffice.

But there is no doubt that serious angles at long distances can have a big affect on your hitting what your aiming at, and that can be critical when hunting. There are numerous good methods for determining the information and some have been mentioned. Fact is though some of us cant get enough of modern techknowledgy, and some of us want as little of it as possible.

I have a small device I can put in my shirt pocket if I remember. Its a type of protractor, but designed strictly for angle shooting. When my tripod mounted glasses or the gun is aligned on the target, I can just hold that on and it gives the angle and the percentage difference in yards. It's called a Slope Doper, but frankly we rarely use it.

Virtually all PA l/r hunters use the buddy spotter system, and some also rely on a sighter shot of some type.

Remember this when hunting in steep terrain, the precise information you gathered can be obsolete before you even get a shot off, especially during the rut.