Info Needed, DPS, Dynamic Propulsion Systems

Jeff, if you are interested in EX cases, visit for a complete array of EX casings...

Sounds like another one of Jerry Irvine's shell companies.

Not quite Ray, DPS belonges to Jim Mitchell, from Tennessee. Jim was never an associate of JI.
Fred

And this post sounds an awful lot like a troll....
At the risk of feeding the troll, DSP would be Jim Mitchell.
Philip

I'll risk feeding the troll, to put in a good word for a man who has my respect.
I took Jim Mitchell and Sonny Thompson's first class on EX propellant making. I bought a fair amount of equipment from Jim. The class and the equipment were outstanding, with excellent documentation and highest quality. I have made a few batches of their various "Thunderflame" formulas over the intervening years (not many lately, no time). The other day I was looking at some grains I cast at that first class. They look great, no crystallizing, color changes or particulate dust.
Jim sold casings, nozzles and closures under the DPS name for a while, but I haven't heard anything about him in a while. IIRC, he owns a machine shop, and he probably had to stop with the fun stuff and concentrate on making money. I know that everything I bought from him was a work of the machinist's highest art. I have an H casing of his on my desk at my day job, just to admire.
If you are looking to buy some secondhand stuff that Jim made, I can assure you it started out as highest quality...however it may have been abused by the owner!
I have seen hardware from Loki and John Bolene (Mostly Missiles) for EX users, and both appear to me to be very high quality. If I had the time for EX, I would be buying from them. Dang, I'm getting the itch to cast a few grains again...
Doug Pratt dad-at-pratthobbies-dot-com

And a good guy to do business with (which reminds me I need to order some nozzles).
But you must be a class alum before you can access the site. If you have not taken his class, then "No AP for you!".