As mentioned the classic 2.7 load of Bulleseye under a HBWC and with PB'd WCs works very well in most revolvers. In the M52 with the bullets seated flush things can be a little different. A lot depends on the thickness of the the skirt and the depthof the HB along with the alloy used. With the soft lead swaged Hornady's I suggest starting at 2 gr and working up in 1/10 gr increments until accuracy goes south. In the event that accuracy is still poor to begin with at 2 gr and remains that way....well some guns do have their preferences so just get the Speer HBWCs.

Larry Gibson