If you handload, the 500 would be ok cuz you can load it down but if you don't, factory ammo is uncomfortable to shoot for most shooters, a 44mag would be better in that respect. Dunno about the sights on the current production 500 Handi, but mine were cheap plastic, dunno if they've changed that or not, the term iron sights isn't really applicable IMO if they haven't
, the 44mag on the other hand has nice Williams sights. What year was your UC made, serial number prefix?
Tim