June 4th, 1984. The first round I loaded was for 38 Special - 3.8 grains of Bullseye, under a Speer swaged 158gn RN.
I had 4 guns at the time: Python 6"; 686 8-3/8"; 629 8-3/8"; & 60 1-7/8" (all purchased new less than a year before).
I quickly moved to 357 and 44 Mag with Blue Dot. I had more courage than common sense back then and I'm lucky I never blew up a gun. With dumb luck, I moved to the far more forgiving W296 (when loaded hot, yada yada yada, and all that) shortly thereafter. Moving forward, all my magnum loads were with W296.
October that year, I bought a 'Series 80' Colt 1911 and stated loading 45 ACP. That's when I decided to try W231 and have never been without at least some quantity of W231 (or HP-38) since. It's the best pistol powder ever.