That's really cool that you can form an expensive case from a cheap one like that! And even cooler than a belt can be formed! I'd like to see a video or some pics of your forming die... this is just way cool.
Not much to video. You'd see a mid 60's quite handsome fellow, putting some serious arm muscle on a Redding Big Boss press as a .25-06 case is squeezed into a die, looking like most any other die. The "shell holder" has no case head slot and looks like a round, flat topped platform. Once the case if fully in the die, using max over the top cam action by the big press, the star of the film take a punch and a big hammer, and gently taps the new case out of the die with a few well placed blows. Transformation complete.
I could post photos of the die/shell holder set, but it's easier to go on the CH4D website and see their info. Better done layout than I could do.
Gotta be somewhat of a "hoss" to work the press. 96 pound weaklings need not apply. They need to just buy factory brass...
DF