picking up a 4&5/8 F.A. M-83 tomorrow
I can't name any good factory loads 'cuz I've always loaded my own fodder for my 454 FA but I can tell you that factory ammo will get expensive in a hurry if you do much shooting. If you don't have a reloading press look into an RCBS Rockchucker press and kit. In the long run it'll save you money but more importantly you can tailor your loads to your own tastes. You own the best production revolver on the planet, enjoy.