this is for theory, (an instructional discussion) and in no way a recomendation
the travel can be reduced in two places
1) increase the radius of the trigger arm to the trigger bar. therefore less trigger rotation will provide the horizonal travel of the trigger bar need to rotate the hammer. this is a simple lever ratio, so like for any lever, if you get more throw, you'll need more force. so the trigger travel will be less, but harder to pull. since the travel of the trigger bar is the same, the hammer will strike with the force.
this would require the manufactoring of a new trigger with the changes to pin location, and grinding to the frame for the increased arm radius
2) reduce the dwell of the hammer to the trigger bar. this is not the radius but the contact face of the hammer. thus as the trigger rotates, it will disengage the trigger bar with less travel. this will reduce the hamer striking force since it was not pulled back as far. the timing with the trigger block may need to be adjusted, there is suffecient seperation to allow a pretty significant reduction in hammer dwell. the block could be removed. the hammer surfaces were harden to reduce wear, so for the area where metal was removed will need to heat treated once desired pull is obtained
since the lever ratio stays the same as original, the trigger pull force will be the same just shorter with increased over travel
the over travel can be reduced with a behinf the trigger stop
to compensate for possible light strikes a heaveir hammer spring can be made. increasing the hammer spring will increase the force needed to pull the trigger
the travel can be reduced in two places
1) increase the radius of the trigger arm to the trigger bar. therefore less trigger rotation will provide the horizonal travel of the trigger bar need to rotate the hammer. this is a simple lever ratio, so like for any lever, if you get more throw, you'll need more force. so the trigger travel will be less, but harder to pull. since the travel of the trigger bar is the same, the hammer will strike with the force.
this would require the manufactoring of a new trigger with the changes to pin location, and grinding to the frame for the increased arm radius
2) reduce the dwell of the hammer to the trigger bar. this is not the radius but the contact face of the hammer. thus as the trigger rotates, it will disengage the trigger bar with less travel. this will reduce the hamer striking force since it was not pulled back as far. the timing with the trigger block may need to be adjusted, there is suffecient seperation to allow a pretty significant reduction in hammer dwell. the block could be removed. the hammer surfaces were harden to reduce wear, so for the area where metal was removed will need to heat treated once desired pull is obtained
since the lever ratio stays the same as original, the trigger pull force will be the same just shorter with increased over travel
the over travel can be reduced with a behinf the trigger stop
to compensate for possible light strikes a heaveir hammer spring can be made. increasing the hammer spring will increase the force needed to pull the trigger