Do not do ANY trigger work unless you have a trigger pull gauge! Know what you start with, know what end results you want, and reassemble the gun often for a test! DA pull starts with compressing the trigger rebound slide spring and advances into forcing the main spring back until the sear point is reached releasing the hammer! In SA the trigger rebound slide spring is totally compressed, the main spring is in full tension, and your finger is pulling against the SA sear which is held by the main spring. Changing the trigger rebound slide spring is the first step in reducing the DA trigger pull!
jcelect