Originally Posted By: ToddNELooking for input on a new rangefinder I bow and rifle hunt so I want it to have slope compensation for shooting up or downhill. Max range i would ever need is maybe 800 yards, would like to keep it under $400. Thanks
If I were going to buy a range finder for shooting I would get one with the TBR true ballistic range functions on it.
Why is that you might ask?
Because the rifle scope is setup up and zeroed to shoot over flat ground with gravity pulling on the bullet directly downward the entire flight path. But, if you shoot up hill or downhill then gravity is pulling on the bullet at an angle.
Say you are shooting at a target that's 500 yds away but it's straight down below you. The horizontal distance that the bullet travels would be zero feet. The distance to the target is still 500 yards away but it's below you not our away from you. So you bullet travels straight downward and gravity is not affecting it's flight path. Gravity may be pulling the bullet down but it's still dropping in a straight line. Horizontally it's like the target is right at the barrel not 500 yard out at a horizontal distance from you.
Say the target animal is 500 ft away from you (line of sight) but at a 30 deg angle down a hill side form you. Your line of sight distance is 500 yards but the true horizontal distance from you is the cosine of 30 deg times the 500 yards. So it's shorter horizontal distance from you. Normally you might adjust your scope 12 moa up wards to shoot at a target that's 500 yards away when you are zeroed in at 100 yards with your scope. But that would make you shoot over the top of the target when shooting at it downhill 30 deg. You either have to dial in a differnet MOA adjustment for something line 433.01 yards instead of 500 yards.
Using the TBR function in your range finder will tell you the actual true HORIZONTAL distance that the bullet travels. In other words the bullet drop won't be a much as the horizontal distance to the target is less than when shooting at angles as when shooting over a perfectly level horizontal distance.
Get the TBR one unless you just want to know the actual line of sight distance of things for some other reason.
I got the one with the TBR but at the time I didn't really understand how to use it properly. I just recently learned how to adjust for MOA and use it properly. So now I'm really glad that I spend the extra money to get the one with the TBR on it. In fact now I wish I had bought a better one that's illuminated so that I could use it in lower light situations.
Look at the other range finders and check out the features of each one and compare them to each other. Then you will find something that best for you and your situation.