Searching For Info /Apps to Calculate Velocity when Elevation Increases

[LA50SHOOTER]

Good Day Gent's -
As the title says - I'm Searching For Info /Apps to Calculate Velocity when Elevation Increases. (or decreases) - The significance of this is more pronounced at ELR of course.
- I'm looking for "substantiated" / "scientific" type information, please.
- I know that if I have a load that produces xxxx.x fps at sea-level then my velocity will increase as elevation increases due to air density being less. - If someone can "point" me to an application (software) or similar way to calculate I'll be very appreciative.

Thank You In advance - Ron -

 

[Bart B.]

The muzzle velocity will not change at different altitudes if the ammo temperatures are the same. Downrange velocities will be higher because air density is less.

JBM Ballistics is pretty good,

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi

 

[LA50SHOOTER]

The muzzle velocity will not change at different altitudes if the ammo temperatures are the same. Downrange velocities will be higher because air density is less.

JBM Ballistics is pretty good,

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi

Thank You Bart - Appreciate It !!

 

[chromatica]

There is a very good treatment of this subject in a book called Modern Exterior Ballistics, by Robert McCoy.

 

[JPeelen]

And, quite surprisingly, "Modern Exterior Ballistics" by Robert McCoy can be downloaded from archive.org. Its the 2nd edition, which has the many printing errors of the 1st edition corrected.

 

[Ledd Slinger]

Ron,
I have the "Shooter" app on my phone, but a lot of times I'll just go to the calculator Berger has on their website. They also have a bullet stabilization calculator where you can figure out acceptable barrel twist rates for stabilizing bullets at different elevations.

 

[LA50SHOOTER]

I'll have to check out the Berger Ballistic App your speaking of. - The old one that I have from them didn't have an elevation parameter to input. It was also a downloaded (windows based) version I had saved in a folder on a Lap-top probably 5-6 yrs ago. - Thanks Ron

 

[LA50SHOOTER]

Ron,
I have the "Shooter" app on my phone, but a lot of times I'll just go to the calculator Berger has on their website. They also have a bullet stabilization calculator where you can figure out acceptable barrel twist rates for stabilizing bullets at different elevations.

Just Found it(Berger's Ballistics Calculator - And Does have Elevation !!) - Thank You !!

 

[DocUSMCRetired]

Give this one a go: www.appliedballisticsllc.com/ballistics

 

[LA50SHOOTER]

Thank You Doc, Much Appreciated !!!

- Ron -

 

[dcali]

Be warned. McCoy’s book assumes you understand multivariable calculus, and have the ability to numerically solve systems of differential equations. If you don’t know what the above means, 90% of the book will go over your head. There’s still some cool stuff in there for laymen, but it’s basically a college engineering textbook.

Bryan Litz’s book “Applied Ballistics for Long Range Shooting” is far more approachable and doesn’t assume much knowledge at all. It’s the best non-engineering book on the topic by far.

 

[LA50SHOOTER]

I'm good to go - Thanks !!

 

[338 dude]

Try the Shooter app by Kennedy group

 

[F4D]

Strelok Pro app at 10 bucks is very good.