Here are the trigger pull weights I saw attained this work: And the reset is VERY short Theses numbers could be lower with an 8.5# hammer spring and more polishing, but I think this is a pretty good example of a first pass (plus the 8.5# hammer spring will light strike with anything but Federal primers). David recently boasted a four pound, three ounce DA and two pound twelve ounce SA pull with a firing pin block SP01: http://www.czfirearms.us/index.php?topic=61974.msg409657#msg40965