Fixed the Charter Arms
Thanks to all who have tried to help!
I gambled and ordered three extra strong Wolf springs that fit Charter Bulldog 44s. They are slightly heavier coils and about 1/2 longer than 38 undercover Charters. The inside diam is same for rod that slide through the spring and connect hammer and frame. You have to trim excessive coils using metal snips or Kline tools. It took a little bit of trial and error, but after triming one coil at a time and finding the optimum numbers of coils to leave, my wife could affectively pull trigger. Hammer now impacts primers wery well. I put same spring in my Charter, as well.