This thread jumps around a lot. Is OP interested in repurposing Wolf Steel 7.62x39 into 6.5 Grendel, or is he interested in repurposing 6.5 Grendel Steel, into better 6.5 Grendel ammo? Or picking up fired 7.62x39 steel and running that? He's getting replies for all. If the interest is in purchasing cheap 7.62x39 steel, and utilizing that primed case into 6.5 Grendel, that's actually possible - though wasn't well received when I asked about it. here's a thread on it from January
https://www.65grendel.com/forum/showthre...to-Grendel
Bottom line is casing and powder charge in theory should work with a direct pull and replace with 90 TNT - in theory. Though you'd need to size the primed casing down to 6.5 Grendel to chamber. But depending on how the future goes, it's always good to have a plan:
one could assembly-line process by
-buying cheap 7.62x39 steel,
-collet pull and save the bullets for later resell, (people will buy anything, and these are .311 dia bullets)
-dump the powder via funnel into a separate already sized casing.
-Take the primed empty 7.62x39 and carefully apply lube to not contaminate the primer.
-Resize in 6.5 Grendel dies with the decapper removed (in general the neck-ball actually isn't necessary anyway). And yes, the taper will be a little off since not fireformed. I've found that doesn't matter at all in velocity or accuracy, or even reliable loading so long as not filling up large high-cap magazines with such.
-Wipe off the lube.
-Then run through a mandrel die (probably optional).
-charge with the gunpowder directly via funnel from a casing that just got pulled.
-Seat a TNT 90 bullet.
Good to Go.
A lot of screwing around. But if you want the absolute cheapest and fastest was to get the lowest cost good hunting and target round out of cheap and plentiful 7.62x39 - there you go. Obviously testing should be done to confirm that the powder charge from the 7.62x39 casing is appropriate for the TNT 90 in Grendel format, but if you examine reloading books, it's about the same charge of the same powder between a 123gr 7.62x39 and a TNT 90 Grendel.