I dont carry the Redhawk except in the mountains but I like to keep a couple speedloaders of 44 specials with it in the house in case it needs to be pressed into service socially.
I dont think I've ever shot any factory through any of my 44's. I've got three Lyman moulds and use wheelweights. The 180 WC, The 245 Keith SWC, and the 300 Keith SWCGC.
For the CA Bulldog, I load:
180 gr WC...13.5 gr 2400
180 gr WC...7.5 gr Unique
245 gr SWC...6.0 gr Unique
245 gr SWC...11.0 gr 2400
For the Redhawk I load:
180 gr WC...15.0 gr 2400
I only load enough of these to have a couple speedloaders of it ready. The CA takes a different speedloader so they dont get mixed up. I usually use mag brass for the redhawk anyway but have used this load in special brass. Of course you should reduce these loads by 10% and work your way up.
Your S&W would fall in between my lightweight Bulldog and heavyweight Redhawk in terms of durability. You should still consult a loading manuel to load for it. Lyman makes a great one, I'd get it first. If ya' dont reload, start. Ya' really have to reload to get all the versatility that 44's offer, IMO. Happy shooting!