Thanks Guys. S&W K Frame 357, Light 38's to medium 357's. All makes of brass with 1 to 5 reloading for mileage. I have been on the original spring but it is noticeably heavy. Strain crew is maxed and I even tried a spent primer cup under the screw for more strength. It's my uncles gun made in the 60's and he is giving it to me soon. No action work other than the trigger/hammer was stoned at some point professionally.
The hammer clearly is a light strike in DA with hard primers and the soft primers work in DA but back out enough to drag on the gun impeding rotation. This is annoying. At the moment I am just reloading for it with hard CCI primers and shooting SA only. He never noticed this in the 40+ years he had the gun because he never fired it in DA! I appreciate the help.
Cheers
Moe