Installed this spring in one of my CC and tested for reliability yesterday. I usually keep some Russian ammo for those purposes, and I also shot some federal and cci. About 100 rounds, half of that Russian silver bear, no light strikes. I got bored and stopped at that point. Installed the spring in my second CC. The newer one breaks S.A. between 3.5 and 4.0 lbs, the more shot in gun between 3.0 and 3.5. Older gun has a standard and uncoated hammer, newer - bobbed and NP3'd. Both with EL's trigger work .
Didn't test the DA.