Experienced smith's take some pride in being able to lighten triggers further while remaining safe, but the lower you go, the harder that is to do and the greater the chances of causing doubling or firing on chambering (slam fires). If you learn to shoot triggers a little heavier, you just get used to it and it doesn't throw your groups out. Much over 6 lbs is where I find I start having trouble with my trigger finger pulling the gun out of alignment. At 7 lbs it gets very difficult to obtain a good group for me, and at 9 lbs begins to become nearly impossible, but up to 5 libs, if it breaks clean and has no significant overtravel, it just doesn't matter. The trick is how much of the total trigger weight is take-up, and how much is sear engagement? If you get a high enough portion as the take-up, the final let-off feels very light. This is because your nerves have a logarithmic response to pressure and can only feel changes in pressure of around 10% or greater.
Nick
