Beg to differ
Walkalong--There have been several posters on this and other fora who report successfully reloading steel cases. Therefore I believe yr "not reloadable" is not accurate.
That said, some of those same posters admit that it is a hassle, requires extra force on the sizing die, etc, etc. I expect that it's hard on the equipment, also--steel is not as forgiving as is brass.
While good brass for reloading is available (it's not going away any time soon) it would seem folly to futz with reloading steel. Not to say that it can't be done.
But you won't catch ME doing it!