Sighting in on flat vs hill

[code_blue]

Were yall this good at match in high school? I sure wasn't.

[Bicky]

Were yall this good at match in high school? I sure wasn't.

I went to school in Califonia. They didn't let us shoot guns.

[wpage]

Use the ballistic chart on the ammo box and check for variance.

Best to sart with basics on the level.

25 yards then 100 yards then check the angles.

[Preston-CLB]

Measure the angle of the hill:

If it's 20 degrees. the horizontal distance will be .94 (cosign of 20) of the visual (laser) distance. Set your target at a lasered 212.765 yards to get a 200 yard zero.

At 30 degrees the cosign is .82 so set your target at a lasered 243.9 yards.

I might cosign a loan. I've also found the cosine of angles.

You are correct with your procedure, though.
-P

[theLBC]

A 90 degree incline eliminates all effects of gravity on bullet drop from line of departure.
This usually causes a 100yd zero of an optical sight to be off by more than 3moa.

won't it cone back and hit you on the head?

[watevers1]

find a 100yrd target that marks a 200yrd zero.

similar to this

[Preston-CLB]

won't it cone back and hit you on the head?

And, neglecting air resistance, the bullet will hit your noggin at the same velocity it had when it left the muzzle.

That's going to leave a mark.
-p

[deckhandmike]

It’s just important to me to be dead on since this will be for a hunting rifle and I might, just might be willing to stretch it out over 400 yards or so. I can shoot fine but I don’t want to wound anything needlessly over poor planning. I will be shooting .300 win mag. And yes, I’ll go find a flat spot so I’m confident of my zero. Thanks for the replies. I was just being lazy and figured it couldn’t hurt to ask and judging from the range of responses maybe a few others learned something too.

[ar15barrels]

won't it cone back and hit you on the head?

Only if you are shooting UP in vacuum.
When shooting up in normal atmosphere, the atmosphere will act on the bullet and it will not come back to where it left from.
When shooting down, gravity keeps the bullet from coming back up at you.

[ar15barrels]

What's your definition of "dead on" in moa?

Make sure you get your game to be level to you as well because uphill or downhill is going to effect the bullet when you are trying to be "dead on" the game too.

Just plan to only shoot your game at the same weather conditions and inclination as you set your zero and you are all good.
Otherwise, atmosphere is gonna atmosphere you "dead off" the bullet from your aiming point.

[sigstroker]

Were yall this good at match in high school? I sure wasn't.

That's jr. high math.

[deckhandmike]

What's your definition of "dead on" in moa?

Make sure you get your game to be level to you as well because uphill or downhill is going to effect the bullet when you are trying to be "dead on" the game too.

Just plan to only shoot your game at the same weather conditions and inclination as you set your zero and you are all good.
Otherwise, atmosphere is gonna atmosphere you "dead off" the bullet from your aiming point.

[ar15barrels]

But it's even easier if you park at the bottom of a hill and shoot the critter at the top of the hill so it just rolls down to the truck.
That's how we shoot pigs.

[Epaphroditus]

Confucius say Man who wants to shoot precusely at 400yds but has no chrono and cant use ballistics calc often misses.

At 400 yds for high precision shooting chrono and ballistic calc only is for reference. Shoot at the various distances and get your dope from actual shooting.

[newbutold]

With a new rifle/scope combination, I start at 25yds from a bench.