One thing that can really help the double action is to hone the channel that the trigger return spring rides in. I take a tight fitting brass or stainless brush and run it in and out while chucked in a drill, can also use a small dowel with a little 440 sand paper wrapped around it, free chopsticks from the Chinese restaurant work good. It's the most missed area of an action job, but there are always a lot of machining marks in that channel that the spring runs in. Same with the Sp101 and Gp100. Oh, and when putting the trigger guard back in place keep the palm of your hand away from the two halves, the fit is so tight it can grab the skin when snapping shut, ask me how I know. They're great guns, I think I'm up to a bakers dozen in snubbies and 4 inch models in the speed six and security 6.
