Making 8.6 blackout brass out of 6mm gt

[D-mon]

I am just about to embark on the 8.6 blackout journey.
i have the reamer, the gauge, still waiting for the dies.
i came across some 6mm gt brass and thought that it was so close to the blackout ( except the neck and the shoulder angle which is 35degrees for the gt and 30 degrees for the blck ) That maybe it could be a good alternative to making it from 6.5 creedmoor.

 

[mattri]

Interested in this.

 

[LVLAaron]

You can neck it up and FF it. There are commercial outfits doing it.