Thread: Long Range Shooting and TBR

Originally Posted by ebf

Both the examples you have above show an error of less than 1 MOA.

It just illustrates the problem with ethical hunting at extended ranges...

Let's be honest, most guys with their hunting rigs struggle to hit a 2 MOA plate beyond 400 yds

A solid kill zone on a deer to me is about a 300mm diameter circle. Then work it backwards, if you can truthfully hit a 2.5 MOA sized target repeatedly and consistently (under stress and time pressure), then the max distance you should really be looking at hunting is around 450yds.

300mm may be ok for big reds but on small fallow the lethal zone reduces to half that and it gets pretty tricky over 200m.

Lets put this to bed guys..

1. "First, the range scaling ignores the effect of the bullet slowing down as it travels thru all the air between the shooter and the target." - Bryan Litz

2. Second, range scaling ignores the effect of the gravity that's either acting to decrease or maintain the bullets speed." - Bryan Litz

3. In addition range scaling does not distinguish between uphill and downhill shooting" - Bryan Litz.

@Tui4Me, where are those Litz quotes from pls.

Interested to read more about his comments of differences between uphill/downhill.

It all depends on what "good enough" needs to be. I always input range and angle separately other wise the calculator doesn't know if it needs a wind value for 550m or 600m. The real world difference in shooting 30deg up vs 30deg down is next to nothing in a distance thats achievable. Ie where do you plan to shoot over 1000m at a 30deg down slope. We shoot some decent angles down here but thats never going to happen.

Originally Posted by ebf

@Tui4Me, where are those Litz quotes from pls.

Interested to read more about his comments of differences between uphill/downhill.

At a guess shooting downhill the bullet stays faster for longer. Uphill slows down quicker due to gravity. The longer or shorter its flying will move it further along its curve (or not)

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I disagree Ned, a bullet it's the true distance in a horizontal line that counts it's immaterial if that's angled up hill or downhill. Gravity is a constant.

NED is correct.

"A bullet always shoots slightly higher when it is fired downhill than when it is fired uphill at the same angle. The reason for this is that when the bullet travels upward, there is a component of gravity acting as drag on the bullet that increases the drop slightly.
When the bullet travels downward, on the other hand, there is a component of gravity acting as drag on the bullet that decreases the drop slightly."
Sierrabullets
https://www.sierrabullets.com/exteri...l-or-downhill/

I stand correcited however a theoretical 2/10 of an inch difference in drop at 500 yards between going uphill or down hill doesn't make any difference to your point of aim in practical terms.

Good find. All I found on my google search was some stuff on bowhunting and shooting up v downhill. A lot more relevant for them than to us throwing lead around. (i.e. the example I saw was a whole yard of elevation difference over 60 yards between up and downhill. Can't remember the angle)

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Originally Posted by ebf

@Tui4Me, where are those Litz quotes from pls.

Interested to read more about his comments of differences between uphill/downhill.

Chapter 4 of Bryan Litz book Applied Ballistics for Long Range Shooting.

Its all makes sense to me now, thanks for the insights

Remember these?
And then use your cosine and los.
Can't fuck it up then

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Originally Posted by ebf

@Tui4Me, where are those Litz quotes from pls.

Interested to read more about his comments of differences between uphill/downhill.

You need this !

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