Wow, I'd forgotten about this post. Unfortunately, the gun I was shooting this load out of was stolen during a home burglary, but I replaced it with a 686P (7-shot). Also unfortunately, I don't think this gun shoots as well, but the loads I've settled on are 12.2 grains of AA#9 with the 158 gr. lead swc, and 5.5 gr. HP-38 with that same 158 gr. swc bullet deep seated into the case and lightly crimped over the shoulder. I also found a decent Power Pistol load with that bullet, but I can't recall what it was offhand. 8 grains maybe? I'll have to go back and look.
EDIT: Yep, just re-read my previous post, and 8.0 grains of Power Pistol with a 158 gr. lswc is a good combo in these guns.