I have some new IMI 7.62x39 brass and some once fired PMC and Fiocchi.
I think I would lose too much case capacity with the thick walls of the IMI brass, but the PMC and Fiocchi should work fine for making 6.5 Grendel brass.
Is it worthwhile to do this, considering the cases will have to be fireformed? Hornady 6.5 Grendel brass is expensive at 70 cents each and in my experience with it, a lot of cases are lost after only one or two firings due to loose primer pockets. Lapua brass will last forever, but at over $1 each, it gets kind of expensive.
On the other hand, I figure I will have at least 32 cents in powder, primers, and the bullet to fireform, plus the 17 cents or so I could sell the 7.62 brass for. That puts me at 49 cents for twice fired grendel brass.
I know the Fiocchi 223 brass lasts forever, but what about the 7.62x39 brass? If I would get several firings out of it, I would definitely go to the trouble of converting it.
So what should I do? Sell the 7.62 brass and buy Lapua 6.5 grendel brass or convert the Fiocchi 7.62 brass?