Shooting up/downhill

[rbahri5206]

When you shoot downhill and compensate for that, example 500 yard shot downhill really ranges at 435. Is that the same as uphill or is it a longer shot uphill?

[diver160651]

Yes. Unfortunately many people instinctively hold high on high angle shooting when they should be holding low (or recalculating gravity zero)


Jt

Sent from my iPad using Tapatalk HD

[JMP]

Simple, measure the angle of elevation and use the Cosine function on that angle to get the adjustment. Many rangefinders have this feature.

Also, it's a disadvantage to have to shoot along a hill or flat because your scope will pick up all the convection currents that linger above the ground, creating a massive mirage. It's easiest to shoot from a hill on a path of travel well above ground level (such as hill to hill).

[rbahri5206]

Yes. Unfortunately many people instinctively hold high on high angle shooting when they should be holding low (or recalculating gravity zero)


Jt

Sent from my iPad using Tapatalk HD

Thanks. I cant blame people for holding high just because instinct makes you believe you should be holding higher.

[CK_32]

If your using you a scoped rifle there is a formula to run to give you an adjustment for the scope to set your dial for the range where your POI will be. I use to know it by heart but it's been a while since I was serious about LR stuff.


Doesn't really change POI much. I believe at like 520 yards a down view of like 15 degrees was a range adjust me of like 468 or something. Again there is a formula you can use if your have an angle reader and know the given range for an exact adjustment off your scope and data.

[rbahri5206]

Degrees Multiply by

10 .98
20 .94
30 .87
40 .77
50 .64
60 .50
70 .34
80 .17

Here is the formula the the left number is angle. so for example 300yd shot at 30deg would be 300 X .87=261 yds

[junior40er]

What's if it's 30 degrees up?

[postal]

Up or down makes no difference.

What matters, is the REAL, level distance from shooter to target. A correction for 30 deg downhill, is the same correction for 30 deg uphill.

Think of it as solving the side of a triangle- pthagorum theory.... If its a 90 deg triangle, A (squ) + B (squ) = C (squ). Up or down.... doesnt matter.... C(squ) is still C(squ).

You're looking at the flat level distance to target. Thats the tangent that gravity will affect the bullet. Thats what affects the drop.

If that doesnt make sense..... ask yourself how gravity will affect a 1000 yd shot straight down....... Would you hold for 1k? or not?

[ratled]

NSSF has a great little video on shooting on angles

ratled

http://www.youtube.com/watch?v=wTSBcNgGMNo

[rbahri5206]

NSSF has a great little video on shooting on angles

ratled

http://www.youtube.com/watch?v=wTSBcNgGMNo

great video

[LCU1670]

Everything has to do with gravity, when you shoot uphill or downhill, for the actual distance you are shooting, gravity will affect you bullet less. So when shooting up or down hill, if not compensated, you will always shoot high.

[stonefly-2]

Thanks. I cant blame people for holding high just because instinct makes you believe you should be holding higher.

iv'e never been in the position to need to but i have thought about it. what i decided was that i would try for a heart shot for the exact opposite of the reason i might take a high shoulder shot at longish range.
my zero is 100 yd. due to the type of cover i usually hunt.