Real Pressure Barrel and Receiver, anyone own one?

[Reloadron]

You could always save Thousands and get a Pressure Trace gauge.

http://shootingsoftware.com/pressure.htm

I have looked at that system and done some reading on it. This past summer I had planned to build my own version, not so much to get real accurate numbers but more to look at the curves on different loads with some focus on looking at how fast the charge burned. Ended up with some surgery done so a few things went on hold.

I think it was also Bricklee who brought up a few possible downsides to using a strain gauge for this sort of measurement. However, these units seem to work. Much less expensive than the high end transducers. Maybe this summer I'll try and get into it again.

Ron

 

[Peter M. Eick]

Thanks for the info about advanced degrees. I did not realize that no schools here in the states did not do ballistics anymore. Interesting. I would not have expected that. I guess I will continue to work the problem and learn as I go. Having done the advanced degree route for my current career I just figured it was the way to go for the next career. Obviously not.

Thanks for the link on prodas. I have to investigate that more.

Regard RSI. I have looked at it several times and even bought a contender specifically to mount the system on. The problem I have with it is the relative comparison method and the assumptions built into it. Maybe it is a lack of understanding but you are calculating the pressures based upon the assumption of the material strength. I was going to try and skip over that assumption and go directly to physically measuring the actual pressure like a pressure barrel.

So the path forward is to continue investigating. Talk to RSI some about their system and make a run up to College Station and talk to Wiseman about their pressure barrels.

Thanks for the help all.

 

[788Ham]

1858, So, who does make the best primers? I'll be waiting to find out, then make some possible changes. Ha

 

[Reloadron]

Peter, I would be interested in what RSI tells you. Please do share after you talk with them.

Ron

 

[Peter M. Eick]

Give me a while. I tend to plod along collecting information and then acting on it. I hate to bother RSI before I really understand the system and can ask detailed questions. I will post what I find in a new thread eventually.

 

[rsrocket1]

Study up on the entire measurement systems of internal ballistics. I think you can make some assumptions that will save a lot of money/time/effort when transferring ballistics from one system to another.

For instance, when you develop a load that gives very consistent velocities out of the same gun, you can assume it probably delivers the same peak and total pressure out of each loaded cartridge. Whether that cartridge is fired in a lab grade reference gun or a reasonably made gun intended for shooting, the pressure traces should be close (how close will probably matter whether you want to spend $2k or $50k for the equipment).

If you were able to send loads out for testing and test the same loads against you gun, you would now have a reference point from which you can now test lots of other loads with the assumption that the elasticity of the metal in your gun follows a known path (usually it is what RSI bases their strain gauge reading on, I would assume it is linear). Kind of like calibrating your scale with a reference weight.

Anyway, if it were me, I'd get the RSI system and have fun with it and use the other $40k on more guns, ammo, test instrumentation and study material.