Balistics Software

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Re: Balistics Software

Post by samoohrye » 10 Jul 2017, 4:15 pm

Not a very fancy solution but I have just used Excel for mine.

Run JBM on the net and past the results into excel.

Insert 'Line Chart' using the data you pasted and there you go. Graphical view of your trajectory :)
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Re: Balistics Software

Post by bladeracer » 10 Jul 2017, 4:56 pm

sungazer wrote:A good estimate of MV given the load and the projectile and barrel would be nice. I have think the ADI data can be a bit out from my results.


You want software that can calculate your muzzle velocity?
ADI velocities are usually pretty close with my loads in everything I've chronographed.
My 22" 7mm-08 100gn my velocity is 40fps less than ADI says from their 24" barrel.
My 22" 7mm-08 160gn is 30fps less than ADI lists from their 24" barrel.
My 22" .204 24gn is 80fps less than ADI lists from their 24" barrel.
My 24" 6.5x55mm 95gn load is 60fps less than ADI lists for the 100gn bullet from the same barrel length.
My 21" 6.5x52mm Carcano 160gn is 15fps more than ADI list for the same barrel length.
My 29" 7.62x54R 100gn is the same velocity as ADI list for the 110gn bullet in a 24" barrel.
My 25" .303 100gn is 70fps less than ADI says for the 125gn bullet from their 24" barrel.
My 23.5" 8x57mm 180gn is 40fps more than ADI lists from their 24" barrel.
My 23.5" 8x57mm 196gn is 10fps less than ADI lists for the 200gn bullet from their 24" barrel.

They're certainly close enough to make pretty good estimates of velocities.

But I would take ADI's barrel lengths and twist rates with a grain of salt.
And they list bullet weights that certainly do not work with their listed twist rates. And when you email and ask them to confirm they state that the numbers are correct as they tested them. I think this is simply a flaw in their layout - it doesn't allow them to list the correct twist rates for each bullet tested, they can only list one twist rate for the entire cartridge.
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Re: Balistics Software

Post by Lorgar » 28 Aug 2017, 11:37 am

samoohrye wrote:Not a very fancy solution but I have just used Excel for mine.

Run JBM on the net and past the results into excel.

Insert 'Line Chart' using the data you pasted and there you go. Graphical view of your trajectory :)


That could be handy, could I trouble you to PM me a copy mate? :)
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Re: Balistics Software

Post by Gwion » 29 Aug 2017, 9:20 am

http://www.shooterscalculator.com/balli ... -chart.php

Has output option for trajectory line graphic.
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Re: Balistics Software

Post by Xerox » 29 Aug 2017, 1:31 pm

Very handy, I'll be using that :thumbsup:
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Re: Balistics Software with graphic output of the curve

Post by Gwion » 29 Aug 2017, 3:40 pm

Here's a link to the chart and graph i've just printed out for my rifle at the local range, using annual average climate data as a base line and high pressure/low pressure + 10C temp increments as variables:

http://www.shooterscalculator.com/balli ... t=3cdfabff

Putting the base line chart against my recorded data at 500 & 600yds, it is quite accurate. I'll use this to do my initial scope set up before i put my sighters down range in F-class. :thumbsup:
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Re: Balistics Software with graphic output of the curve

Post by bladeracer » 29 Aug 2017, 3:48 pm

Gwion wrote:Here's a link to the chart and graph i've just printed out for my rifle at the local range, using annual average climate data as a base line and high pressure/low pressure + 10C temp increments as variables:

http://www.shooterscalculator.com/balli ... t=3cdfabff

Putting the base line chart against my recorded data at 500 & 600yds, it is quite accurate. I'll use this to do my initial scope set up before i put my sighters down range in F-class. :thumbsup:


2.3" scope height seems extreme?
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Re: Balistics Software with graphic output of the curve

Post by Gwion » 29 Aug 2017, 4:02 pm

That's what i measured it at but maybe i should recheck it.

Center of optic to center of bore. 56mm Objective mounted on 20moa rail.

EDIT: Just remeasured and it is 55mm as well as i can can measure. Conversion says 2.16", so i should change it but i don't think 0.15" is going to make a huge difference. My guesstimated conversion was a little off.
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