I bend the trigger springs to lighten but use over power Wolff hammer springs of 26# for dependable accuracy. Do not reduce the hammer spring. I get down to 19 oz and average 1-1/2# pulls on Rugers, BFR's.
The transfer bar can be too short for this and if your finger kicks to drop the bar you can get a hang fire or no fire. I make my own transfer bars to cover the pin.
I messed up once by heating a spot to fix fit and it broke. The whole bar must be hardened and tempered again. My SBH has shot with my bar for near 98,000 rounds now.
Pull the hammer to full cock and see how much the bar covers the pin. It should be near the top.
I can generally get New Models down to 3.5 pounds with little-no creep and no 'push-off'. I leave them right there and a lot of shooting burnishes the contact surfaces for a stable 3 pound, entirely safe and shootable trigger. I don't want or need anything lighter than that.
