AA1680 substitute??

[Schrambo]

Saw this on the 300BLK forum...

Has anyone tried using any of Thunderbird Cartridge Company's T680 powder? It is supposed to be equal to AA1680.

http://www.tbirdammostore.com/powder-store.html

[Great-Kazoo]

better response here
https://www.ar-15.co/forums/103-Ammunition-Ballistics-and-Reloading

[Schrambo]

Thank you Great Kazoo, my search-fu is weak...