Internal ballistics caclulator

308BAR

308BAR

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I've seen a lot of external ballistics calculators on the web, however haven't seen many that would calculate internal ballistics. Load data from disk seems to be the only one available. I'd like to calculate pressure of the rounds I'm loading. Anyone w/ an online calculator available? Thanks in advance. :)
 
Internal ballistics are far, far more complex to calculate than external ballistics. External ballistics are really, really simple in comparison. You are not going to find a "free" program except maybe if someone posts sample results for one specific combination of a powder/bullet/rifle.

I have used Quickload and with some powders or bullets, even Quickload can have a real problem getting anywhere near observed velocities, which probably means that the pressures would also be way off.

You can download a demo of Quickload from their website. I think the demo has the Quickload Manual. Go to the back of the manual and they show you the process they go through to be able to calculate interior ballistics. A hugely complex process.

It required a lot of dedication/concentration to learn how to use the program and understand how it was coming up with its results.
 
Quickload, the only one I know of with enough flexibility to do serious "what if" development. Sold in NA by Neco. In my bottleneck rifle cartridges, when I feed it good data it's within 1% of chrony measurements.
 
acrashb said:
ps: LFAD (Load From A Disk) , if that's what you're talking about, has serious limitations that make it barely more useful than a good loading manual. You don't pick powders: it picks powders that it thinks are good for you. It won't do pistol calibers. And so on.
Click to expand...

Yes, I stand corrected.

I'm not really to concern about speed calculation, but more for CUP or PSI calculation for powder and shell. I've got some older rifles and I want o make sure they don't go BOOM on me because i fed it to much powder/or combination of bullet.
 
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QuickLoad

++ For quickload, I have chrono data for 6 rifles, and at least 12 different bullets, I have found it to be about 50 fps above what I measure, and I have data for one load where I measured pressure using Pressure trace, and both agreed.

One of my loads was a wildcat, using 6.5-270WSM case, and Alberta wildcat bullets, after feeding in the measurments the calculated and chrono data were very close.
 
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