I posted this answer, to your exact same post in the Single Shot Rifle Section of this forum:
Ensure the rifle is empty, before attempting any trigger adjustments.
The lower, or rearmost, screw on the trigger face is the trigger spring adjustment screw - used to increase/decrease weight-of-pull down to a preset factory minimum (governed by spring pressure). It is tightened to increase the weight-of-pull.
The uppermost, or forward, screw on the trigger face is the trigger stop screw - used to adjust trigger over-travel. It is adjusted by tightening it, until the sear will not release the hammer when the trigger is pulled - then slowly backing off the screw while you maintain pressure on the trigger, until the hammer falls.
After the hammer falls, back it off another 1/4 turn, to allow clearance for the hammer.