In my opinion, Unique is certainly one of the very best powders for .44 special. My S&W 624 seems to shoot 240 grain LSWC better than any other. I would think that a starting load (according to Alliant's website) and a 240 grain pill would work great. Although in the Charter, I would possibly try as light as 180 grainers, as the lighter bullet should reduce pressure somewhat.I have one of the older model Charter Arms Bulldog 44’s and I know it is somewhat of a “thin clad” so to speak and would appreciate any 44 Specials loads to favor this relic.
WARNING! THIS POST CONTAINS UNVERIFIED LOAD DATA AND ANY DATA USED SHOULD BE TREATED AS SUCH. If you fail to start low and work up it's your fault should something happen.