UPDATED 12/8/22 - I am a Licensed Manufacturer of Small Arms Ammunition Other Than Destructive Devices - Halworx Ballistics LLC (682) 552-9479 -
I manufacture 8.6 Blackout ammunition in two flavors at the moment. A 285gr ELD-M Subsonic and a 350gr Maker Rex Expanding Subsonic. I use Hornady once-fired brass. The process is I wet tumble in stainless steel tumbling pin media, dry tumble in walnut/corn cob media, anneal in an AMP Annealer MkII, full-length size, cut to length in a Honey Badger case trimmer to approximately 1.690” which uses a trim die that final forms the neck and shoulder junction while trimming, final trim in a Giraud case trimmer to 1.680”, and final tumble in dry walnut/corn cob media. I check the primer pockets with a primer pocket go/no-go gauge, and check the casing in a Sheridan case gauge before loading.