Can I ask where you got the Bisley hammers from ? I need one for my single 7.My very first 327M was the 5.5", I changed up the hammer (Bisley), front sight, Belt Mountain #5 Basepin, slimmed the trigger.
Next acquired the Birdshead, Changed to Bisley Hammer and Black Mikarta grips.
… and then the 5.5" Blue Bisley,,, swapping out the Bisley Grip Frame, for the Brass Keith #5 (RW grip frames) & a BM #5 Basepin.