OK, I've never used a reloadable casing, but I plan to use them in my LOC Graduator, once I break it out and build it. I've got a book that shows examples of reloading them, but I'd like to see a basic exposition on the selection and use of casings, the marking code, selection of loads. You see explanations of the C6-5 type markings absolutely everywhere, but I've seen much less about the Aerotech / Dr. Rocket style stuff and markings. Does Aerotech publish anything on that? Other source?