View previous topic :: View next topic |
Author |
Message |
NewB Rookie Member
Joined: May 23, 2013 Posts: 7
|
Posted: Sun Jun 09, 2013 8:38 am Post subject: Long dist. shot formula |
|
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.
|
|
Back to top |
|
|
Ominivision1 Super Member
Joined: Sep 20, 2010 Posts: 2984 Location: Iowa
|
|
Back to top |
|
|
radar Super Member
Joined: Oct 01, 2008 Posts: 1109 Location: North Island New Zealand
|
Posted: Sun Jun 09, 2013 1:18 pm Post subject: Re: Long dist. shot formula |
|
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
_________________ People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.
George Orwell |
|
Back to top |
|
|
Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
|
Posted: Mon Jun 10, 2013 6:26 am Post subject: Re: Long dist. shot formula |
|
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.
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
|
Back to top |
|
|
Vince Site Admin
Joined: May 25, 2005 Posts: 15697 Location: Brisbane AUSTRALIA
|
Posted: Mon Jun 10, 2013 7:01 am Post subject: Re: Long dist. shot formula |
|
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
_________________ Cheers, Vince
Illegitimi non carborundum
(Never let the bastards grind you down)
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.
"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done) |
|
Back to top |
|
|
DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3570 Location: Utah
|
Posted: Mon Jun 10, 2013 8:15 am Post subject: Re: Long dist. shot formula |
|
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
-DallanC
|
|
Back to top |
|
|
Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
|
Posted: Mon Jun 10, 2013 9:06 am Post subject: Re: Long dist. shot formula |
|
Spin drift is a more legitimate concern and even that is about 3/4 MOA max at 1000 yards with a .308 match bullet.
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
|
Back to top |
|
|
NewB Rookie Member
Joined: May 23, 2013 Posts: 7
|
Posted: Mon Jun 10, 2013 11:19 am Post subject: Re: Long dist. shot formula |
|
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.
|
|
Back to top |
|
|
Ominivision1 Super Member
Joined: Sep 20, 2010 Posts: 2984 Location: Iowa
|
Posted: Mon Jun 10, 2013 2:13 pm Post subject: Re: Long dist. shot formula |
|
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.
_________________ Regards
Limitations are but boundaries created inside our minds. |
|
Back to top |
|
|
NewB Rookie Member
Joined: May 23, 2013 Posts: 7
|
Posted: Wed Jun 12, 2013 10:40 am Post subject: Re: Long dist. shot formula |
|
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.
|
|
Back to top |
|
|
radar Super Member
Joined: Oct 01, 2008 Posts: 1109 Location: North Island New Zealand
|
Posted: Wed Jun 12, 2013 7:38 pm Post subject: Re: Long dist. shot formula |
|
Too late it is already, its recommended by a lot of good sites and in print.
_________________ People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.
George Orwell |
|
Back to top |
|
|
|