First I've heard of these,,should get out of the cave more often.

I thought the posting was going to be about reloading military steel cases like in 45acp. That works OK but I don't see much advantage to it when the brass stuff is available, cheaper
You can still use your $25 a set dies to reload the older steel cases.
I wouldn't be wildly crazy about buying all new dies at high prices to go along with new higher priced steel cases too. I doubt they'd be making them in stuff like 9.3x72R and 25Remington,,you know,, important rounds.

All that could change if the price of brass for some reason goes crazy or we send every scrap of it to China as a friendship offering, or the EPA decides empty brass casings on the ground pose a threat to wildlife like spent lead. Not too far fetched I guess in these times.

Maybe the Military will be a big buyer,,they like new stuff especially if it costs more.
But then what will they use to make trench art out of. The brass stuff works so nicely and solders easily.
Another fine art potentially lost to the ages.