Great revolver, used a 6 1/2" bbl'd 624 for nra bullseye for several years. The 624's are capable of excellent accuracy, keep your alloy soft (8bhn/9bhn). Check your cylinders typically you need a .432" bullet for the 624's. I mostly shot wc's in my 624 but I did burn a lot of different 44casl bullets laying around from casting over the years along with when I switched over to pc'ing pistol/revolver bullets. Did a lot of plinking loads most were surprisingly accurate.
Clays 4.0gr
WST/AA#2 4.5gr
Bullseye/reddot/titegroup/American select/trailboss 5.0gr
WW-231/universal clays 5.5gr
One thing I always like to do with the 44spl is piggyback the loads. Typically the same load for the 44spl will work in the 45acp & plinking loads in the 357's.