Try the EMF " Alchimista" , It has the largest grip...
of the single action cartridge guns , that I know of. Another would be the Bisley type grip found on Rugers and Colt type replicas. In 2008, the "Alchimista" was judged to be the best gun , for the money, by the SASS. The action of the Pietta revolvers are very smooth out of the box and next to my Colt SAA , it is the best of all the relicas that I have.