Up/Downhill corrections

[Buffalobob]

Eddybo

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gives true distance?


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This is where the problem begins in understanding the issue. There are many true distances. The laser measures a "true" straight line distance. It is not the "true" distance the bullet travels. Infact distance is not the chief concern, it is just something you can measure in the field very easily.

The chief concern is the angle of the bullet with respect to gravity and how long gravity has to accelerate the bullet downward. Because the bullet path is not a straight line, but a big looping curve at long range, there is no simple way of accurately calculating the exact effect of gravity on the bullet. Computers can make more complex calculations quicker than one of us out in the field but you must first ascertain whether the guy who wrote the computer program actually KNEW WHAT HE WAS DOING. In the world of computer programming is the saying <font color="red">GARBAGE IN GARBAGE OUT </font> , meaning that a computer is no better than what is put into it. It is not a magic box and there are just as many quack engineers and physicist as there are doctors and lawyers.

I know this does not fully answer your question but I hope it gets you started back to a new basic understanding of the issue.

[jwp475]

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I admit I am way out of my depth of understanding here, but I have a stupid question anyway. What adjustment if any would you have to use if you were using one of those fancy range finders that auto corrects for angle and gives true distance?

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It would give the same answer as useing the cosine for true horrizontal distance and the same aiming error because the bullets time of flight is not calculated as in Shawn's original post..........

[eddybo]

Thanks BB and JWP475...that is kind of sorta exactly what I thought, but wanted to be sure. I am not shooting far enough for this factor to be of great conconcern yet, but when I reach those distances I will invest in one of the more advanced ballistics programs.

[Shawn Carlock]

Here is the new Nightforce angle indicator. The indicator is produced by Sniper tools and the mount made by Nightforce.

[IDAHO PREACHER]

Got a price and availability? IP

[Shawn Carlock]

Availability is good I have a couple in the shop and they are 150.00 + shipping. They come only as an indicator and mount only.

[Partagas]

Is there a correction factor you could just multiply your cosined adjustment by for bullet time of flight? Or is the bullet time of flight part of it way too complicated w/ too many variables that you need exbal?

I just thought you could make a rough chart for your slope distance to further adjust you cosine adjustment for when the batts go dead on the palm etc.