glockorama-the other posters have given you excellent advice! Yes, the mainspring tension screw DOES need to be "bottomed out" or screwed ALL THE WAY IN. If that results in a DA triggerpull that is too heavy, you can try one of the reduced-power mainsprings, available from Brownell's, Wolff, Wilson Combat, etc., OR you can VERY CAREFULLY reduce the length of the TIP of the mainspring tension screw-a LITTLE at a time-like, say, ten THOUSANDTHS or so...and try it for "feel" and ignition reliability. I wish I had a dollar for every used S&W revo I've seen that had the mainspring tension screw shortened TOO MUCH...I coulda' retired five years ago!!!LOL, and let us know if "bottoming out" the tension screw makes the problem "disappear"....mikey357