If after assembly the trigger seems to have a little creep, I use the old gunsmithing method of “boosting”. To boost the hammer, cock the hammer just as if you were going to fire the pistol. Apply moderate thumb pressure to the hammer so you are forcing it toward the slide and pull the trigger. If you do this approximately 10 times the creep is usually gone. If the creep remains, go through the entire trigger job process again and double check all of the operations to make sure they were all done correctly.
copied from brownells 2 1/2 lb. trigger job, by :Jack Weigand