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Long dist. shot formula
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NewB
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PostPosted: Sun Jun 09, 2013 8:38 am    Post subject: Long dist. shot formula Reply with quote

I don't know where to ask this so I hope I'm in the right spot. Is there a name for the total shot formula??? Better yet, does anyone have it or know where I can get it.

What am I talking about? Well, being exmilitary I know there's got to be some form that breaks the shot down to simple steps. Something like Distance - drop - coreolis x something = mil dot or moa number. Same for wind.
Some type of math that includes all variables (drop, wind, coriolis effect, etc) so you're not missing something or a step.

I hope I didn't confuse you. I know what I'm looking for just dont know what it's called.
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Ominivision1
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PostPosted: Sun Jun 09, 2013 10:31 am    Post subject: Re: Long dist. shot formula Reply with quote

There are a couple of ballistic calculators on-line.

I would highly recommend point blank download available at huntingnut.com/index.p...PointBlank

Other online programs are www.handloads.com/calc/ and www.jbmballistics.com/...tors.shtml

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radar
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PostPosted: Sun Jun 09, 2013 1:18 pm    Post subject: Re: Long dist. shot formula Reply with quote

www.mil-dot.com also has good info.
Download the Sniper Hand book by the US Army, its an older version but has a lot of valuable info on long range shooting and formulae

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Dawgdad
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PostPosted: Mon Jun 10, 2013 6:26 am    Post subject: Re: Long dist. shot formula Reply with quote

How long a range are you talking?

Until you get to 1000 yards most variables outside of wind and distance really are inside your holding ability and will be almost negligible factors relative to that uncertainty.

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Vince
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PostPosted: Mon Jun 10, 2013 7:01 am    Post subject: Re: Long dist. shot formula Reply with quote

I must admit, I had to do a little research on this to find out exactly what you are concerned about NewB. As far as the Coriolis Effect is concerned, any effect on a small arms bullet is so miniscule to the point of being not a concern.

If you are looking for formulae to calculate the effect, check out this link. There are enough formulas in there to mess up ya head and to keep a mathematician happy for many a long day mate.

Coriolis Effect

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DallanC
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PostPosted: Mon Jun 10, 2013 8:15 am    Post subject: Re: Long dist. shot formula Reply with quote

Vince wrote:
I must admit, I had to do a little research on this to find out exactly what you are concerned about NewB. As far as the Coriolis Effect is concerned, any effect on a small arms bullet is so miniscule to the point of being not a concern.

Precisely why I havent included the effect in my calculations within PointBlank. Some people though hate that it doesnt include it, but in conversing via email alot of them dont realize for the ranges they shoot the effect is something like 1/16" of an inch worse case (remember that all factors in if you are shooting east vs west vs north / south).

If there is a valid need for it, I can look into adding it. But as of yet noone has really been able to convince me its needed. If you are using PointBlank to calculate your 105mm howitzer shots, you have other problems Very Happy


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Dawgdad
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PostPosted: Mon Jun 10, 2013 9:06 am    Post subject: Re: Long dist. shot formula Reply with quote

Spin drift is a more legitimate concern and even that is about 3/4 MOA max at 1000 yards with a .308 match bullet.

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NewB
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PostPosted: Mon Jun 10, 2013 11:19 am    Post subject: Re: Long dist. shot formula Reply with quote

Ominivision1 thanks for those links and I do use JBM now but I cant download it to use in the field. I like their MPBRZ, MPBR, vital zone radius, and MRT (aka Range of Maximum Height). I find them VERY useful. (I hope it will be added to point blank )

And yes I have point blabk as well, and in there I like the trajectory chart. When I move over it, it shows the distance, rise/fall anywhere I move the courser, VERY nice to use.

My question was more for a checklist type order of making a long (1000+ yd) shot. Rather than trying to remember this, that, and the other. I'm thinking there's a checklist of items to enter values.

Radar, I like MOA moreso than mil-dot but love to learn so I'll look for the book.
Thanks to all.
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Ominivision1
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Joined: Sep 20, 2010
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PostPosted: Mon Jun 10, 2013 2:13 pm    Post subject: Re: Long dist. shot formula Reply with quote

A couple of years ago 3 years to be exact, I modified and existing ballistic spreadsheet (xls) and added mil-dot and MOA info to the program. It runs under any version of excel or open office and also runs on phones that have excel or OO installed. You just have to enter your figures once for a given bullet, powder, charge weight etc and it will take care of the rest giving you a printable sheet with moa and mi-dot values so you won't have to remember.

If interested, pm me your e-mail address as the site will not accept .xls files.

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NewB
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PostPosted: Wed Jun 12, 2013 10:40 am    Post subject: Re: Long dist. shot formula Reply with quote

MY Mistake. Sorry, point blank isn't the program I was talking about. When you move your couser over the trajectory graph you get a read out on the bottom af distance/height or drop of the point your pointer is on. The program that does that is remshoot by remington.
Another good idea for point blank to add in their program to make it the best.
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radar
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PostPosted: Wed Jun 12, 2013 7:38 pm    Post subject: Re: Long dist. shot formula Reply with quote

Too late it is already, its recommended by a lot of good sites and in print.

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