Johnny, thanks for the kudos and the tolerance. I've had to do a detailed search to come up with some brass, dies and the G-H-I dies for the Lyman sizer. It's been several years since I did any .357 shooting. The old Ruger 3 screw is pretty well worn out. So it's in semi retirement.
I was planning to get this GP-100 for some time, so I ordered a Lyman 358156, 158 gr. gas check 2 cavity mold. I cast some a couple months back, tumble lubed them, then got busy, AND it WAS hot in the loading room. Central air has taken the heat out of the equation, so I can load comfortably now. That bullet is Skeeter Skelton's favorite. A thread here or over on TFL urged me to order that particular bullet. It appears to be a winner, even without shooting any yet.
Got some sized and gaschecked, even got a few loaded with 6.2 gr. of unique. Problem is; the only dies I have are Lyman. They don't work with the lee powder-through-expander auto disc system. Manual powder measuring sure gets old in a hurry.
Shot an order off to midway for the lee 4 die set in 38/357. Then I can load on my lee classic turret. Once I get a load developed, I'll switch over to the dillon 650. Midway even had some Winchester brass-brass, so I ordered 200.
I also have some west coast 125 and 158 plated SWC. And some Winchester jacketed 158 hp. So plenty of stuff to be working loads for.
I've removed the factory grease from the GP-100, gave it a go-over with eezox oil. It's my go-to for cleaning and preservation. Besides, I don't mind the smell! The new gun just looks tough and rugged. I hope she shoots good to boot!
I'm feeling a bit better today, IF I get some more loaded, I may make the trip to the range to break in the GP.