Way to go, Doc!
Very nice targets, my friend...a good gun you've got there. I've had good luck with HP38 or Win 231 and 9mm over the years.
With 124 gr cast bullets
I've had great luck with 4.0 - 4.3 gr of Win 231...good ejection, mild shooting, no leading, and great accuracy...in a Sig 226, Colt Combat Commander and a full size Colt Gov't Model.
With 115 gr JHP's (Win and R-P)
, 4.7 to 4.9 gr of Win 231 or HP38 does the trick. I seat them to 1.125" and get a chrono'd 1156 fps from the Sig. A great load. Here's the pic.
Best Regards, (PS: I'll take that Commander off your hands anytime...$200 cash money!!) Rod