Nice!
Yes, I've had a Convertible Blackhawk for 12, maybe 15 years. I like both cylinders, thanks very much.
Being a handloader, I shoot piles of .45 ACP, and every now and then I experiment - as all handloaders should do - and, experimenting a LOT, sometimes a batch doesn't work as intended.
If I load .45 ACP and my bottomfeeders are finicky about the load, I just shoot them in the Blackhawk. The 45 Colt cartridge wasn't really made for plinking loads, but I can shoot the .45 ACP all day long with 185-gr wadcutters and save the full house 45 Colt ammo for hunting. I always stick with published loading limits, but there is a reason you will find loads "For Ruger and T/C Contender ONLY." Either will routinely digest ammo that would wreck an original Peacemaker.
So, yes, indeed, the extra cylinder gets plenty of use in mine. I know that the days of finding cheap milsurp .45 ACP ammo are gone, but if you price .45ACP at Wally World you will find it's often HALF the price of .45 Colt ammo that's woefully lacking in oomph.
That kinda leaves you with the .38 Special / .357 Mag kind of debate. My convertible cost me less than $50 more than the .45 Colt (only) Blackhawk was priced at, so I am very happy with the whole deal.
No, no moon clips. If you really like to handload or get a great deal on .45 Auto Rim ammo, there ya go....