The comment about pressing forward on the cocked hammer is a good one.
Doing so 'burnishes' the contact areas, and it's an easy fix for you to try.
Just be certain the piece is unloaded - cock it and press the hammer forward as you pull the trigger.
Do this until 'you' notice a marked smoothness and you're set.
We used to do this on M1911A1's to help 'mate' the bearing surfaces after a trigger job was performed.
Good Luck.
Vaya,
Scouts Out!