[flatbutt]

Originally Posted by Jeff Higgins

If you are getting reliable ignition when firing double action, lightening the hammer spring will not result in light strikes when firing it in single action mode. When you cock the hammer to fire it single action, the hammer goes much further back, putting more tension on the hammer spring, than it does when firing it double action.

Try this - making sure it is not loaded, cock the hammer. Note how far back it rests. Then ease it back down to its rest position and use the trigger to work the hammer double action. You will notice the hammer releases when it is only about 2/3 as far back as when it is cocked for single action. So, if it falls hard enough in double action, it will always fall hard enough in single action.

You can play with mainspring tension on these without having to buy a new mainspring. There is an adjustment screw on the lower front of the grip frame, where your pinky would rest. It's hidden by the grips. Most of these I've seen come bottomed out, at full tension, out of the box. That's usually not necessary. Try backing that screw out a quarter, maybe half a turn at a time and see what happens. You will eventually start getting light strikes in DA mode. When you do, go back in a bit.

Thanks Jeff. BTW I reversed SA and DA. Doh!