It is one of those things that shows up every so often and then seems to disappear again. Better to stock up when you finally find some because with the ammo/brass situation right now I'm sure it's on the back burner.
I've never done this so am not recommending it- but something you could study out a little more if you need it right now- but "supposedly" if you are careful with the first loading you can use 30-30 brass.
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