Razorback Red

I’ve searched and can’t find a definitive answer. I’d like to order one in brass in .357 if they are approved. Any help would be appreciated. Thanks!

New to black powder/frontier cartridge. Are all black powder substitutes allowed for SASS sanctioned matches and side matches? Is there any rule that would disqualify a participant from a long range side match for using synthetic black powder such as 777, black mz, etc? Asking for a friend. Thanks for your help!