Just to elaborate a little more on the "lighter" trigger bar plunger springs that are being installed. When this is done you loose upward pressure on the trigger bar contacting the disco which allows it to break from the trigger bar earlier giving you a shorter DA throw. We saw a rash of these locally pop up when somebody in the Houston area recommended it and of course as Tanfo owners it caught like wild fire to chase the absolute lightest trigger (BOLO really does not like this due to its tight fitment). These guys have you going in the right direction, we get a slew of phone calls a day asking what springs work with what primers and unfortunately there are to many variables at play to have a go to answer for that. Parts installed, parts fitment, polishing, and primer seating depth all play a huge part as to what you will be able to consistently light off.