Too many folks missing the secondary info asked by the OP: in addition to the powder, what was the ammo used in?
My second center fire handloads:
I believe it was .45 ACP using Winchester 230gr FMJ bullets, CCI-300 Large Pistol Primers and Hercules Bullseye powder. Brass was most likely WCCxx head stamp Winchester.
The pistol was an AMT Hardballer Long Slide. Yes, still have it and the 686 and the 20ga Browning Citori for that matter.