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# Left @ 300 yds - Right @ 1000 yds? WTH?

#92
12-20-2008, 12:20 AM
 Platinum Member Join Date: Feb 2005 Location: Nevada Posts: 2,782
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

Gents,
here are my two cents worth.

This is how I understand it:

Coriolis effect has two components, X and Y. X is a horizontal component and Y is a vertical component.

The X component or Horizontal component has to do with your Latitude, meaning how far you are above or below the equator. Right at the equator the horizontal effect is zero. At the poles you obtain the max. values. It goes from zero to max, from equator to a pole.

The horizontal component has nothing to do with the direction you shoot.

The Y Component or Vertical Component has to do with the direcction you shoot or the Azimuth of the target as well as where you are on the earth. In the northern hemisphere when shooting easward you'll hit high and when shooting westward you'll hit low.

Here how it looks in LoadBase:

Here we are only concerned with Azimuth = 90° and Latitude 45° N. Now let's go to our shooting tab.

This screen does not show any corrections for Coriolis because the Coriolis box is off. When we turn it on, we will automatically see the numbers change for both, elevation and windage.

Because shooting east you hit high, the program corroborates that by showing a lower come up when corrected.

On this last screen-shot, it'll show you in inches the correction needed for x and y at 1200 yards.

__________________
-----------------------------

-----------------------------
HEBREWS 13:8
Jesus Christ the same yesterday, and to day, and for ever.

Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!!

---> As promised, God Sent His Prophet to us!
#93
12-20-2008, 12:32 AM
 Gold Member Join Date: Dec 2004 Location: Black Hills,South Dakota Posts: 669
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

Quote:
 Originally Posted by jwp475

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The Constitution shall never be construed to prevent the people of the United States who are peaceable citizens from keeping their own arms -Samuel Adams
#94
12-20-2008, 01:26 AM
 Platinum Member Join Date: Oct 2007 Posts: 1,190
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

I think our problem is the term "right". Who's right are we talking about....the guy facing north( who's "right" is east), or the guy facing south ( who's right is west). Their "right's " will be oppiset!!. I would think that the proper discription would be...."it's always to the east in the northern hemisphere, and west in the southern hemisphere". (Or visa-versa)

Could this be the case, and would this make sence???

Again......let me have it!!

I know that there is a "poindexter" type out there with funny glasses and a pocket protector with the proper credentials who can clear this whole thing up. I, you see, don't NEED glasses!!

EDIT........I just re-read EAGLET'S post....................Sir.......do you have a pocket protetor??................That looks like a FANTASTIC program!!!........Is it somthing us mear mortals can run, or do you need to be caled "Dr" to run it?

Last edited by 4xforfun; 12-20-2008 at 01:33 AM.
#95
12-20-2008, 02:07 AM
 Platinum Member Join Date: Jan 2003 Location: The rifle range, or archery range or behind the computer in Alaska Posts: 3,740
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

Quote:
 Originally Posted by 4xforfun Again......let me have it!! I know that there is a "poindexter" type out there with funny glasses and a pocket protector with the proper credentials who can clear this whole thing up. I, you see, don't NEED glasses!!

The poindexter type in the white coat with 20 years of college and funny glasses couldnt hit a box car at 1K with 10 tries.

Stick to the boys here who dont have white coats and funny glasses without 20 years of college who ACTUALLY could hit a MUCH smaller target at 1K with one bullet. This is where you will learn the real effects of gravity, air density, spin drift AND coriolus. Are they qualified? Do they have credentials? Yeah its in the results. Not the glasses.
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Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.

Last edited by Michael Eichele; 12-20-2008 at 02:39 AM.
#96
12-20-2008, 02:41 AM
 Platinum Member Join Date: Apr 2005 Location: Alaska Posts: 4,618
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

Eaglet,

My understanding of Coriolis matches yours. Since miechele didn't jump in to correct either of us, I consider that a vote of confidence as I'm of the impression that he's got this Coriolis stuff down pat.

And jwp475 - I'm not certain... but I suspect he thinks we're looney toons or aliens.
#97
12-20-2008, 06:06 AM
 Platinum Member Join Date: Feb 2005 Location: USA Posts: 2,598
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

According to Gerald Perry (Designer od ExBall) the reason that Exball does not include Corrolis Effect is because that maximum effect for the 308 Milltary Sniper round (with the 175 SMK) is less than a scopes adjustment at 1000 yards. In other words less than 1/4 MOA. Coriolis is important to Artillery and Mortor rounds because thry are in the air for a long period of time. Also Corriolis effct is definately direction oriented shooting East and West has no Corriolis Effect. Thie approach works for me out to as far As I have practiced and that's all that I can go by. I have not seen anywhere near the "spin drift" that is being claimed here. On days that I have no percieved wind I do not find that I am consistently shooting to one side of my POA. Yes Spin Drift does exist, but with the bullets that I shoot it is nowhere near the amount that is being claimed by some of these programs with the bullets that are fired from my rifles.

http://www.meyersix.org/the_mysterio...lis_effect.htm
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range it,check the wind, dial in correction, aim and only one shot

Last edited by jwp475; 12-20-2008 at 06:34 AM.
#98
12-20-2008, 11:10 AM
 Platinum Member Join Date: Feb 2005 Location: Nevada Posts: 2,782
Re: Left @ 300 yds - Right @ 1000 yds? WTH?

Quote:
 Originally Posted by phorwath Eaglet, My understanding of Coriolis matches yours. Since miechele didn't jump in to correct either of us, I consider that a vote of confidence as I'm of the impression that he's got this Coriolis stuff down pat. And jwp475 - I'm not certain... but I suspect he thinks we're looney toons or aliens.
Phorwath, you really had me cracking up. LOL
If jwp475 thinks we're looney, I'm not offended by that, he's alright. Just wait for my next post... LOL
__________________
-----------------------------

-----------------------------
HEBREWS 13:8
Jesus Christ the same yesterday, and to day, and for ever.

Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!!

---> As promised, God Sent His Prophet to us!

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