I called Apex yesterday because I was buying their trigger kit and asked them the difference in pull force. They said, word for word: "There is no set force that we set the trigger pull to. All guns are made differently and each part is not 100% the same as another gun of the same model. The installation of our spring kit in the Smith and Wesson SD9VE can achieve up to a 35% decrease in the force required to cause the striking pin to fire. Again, it is up to 35% and the difference has been recorded to be as low as 20%. For me to give you a set number for the required force your firearm will require on the trigger is just not something I can give you with complete certainty."
I was amazed with how honest the person I spoke with was. People are saying that it is around a 8 pound trigger, getting 35% reduction would make it a 5.2 pound trigger and 20% would be a 6.4 pound. What I am trying to say is that Apex Tech admits there is a variation from gun to gun and kit to kit due to manufacturing errors (a spring that is supposed to be 1 inch long ends up being 1.002 inches, etc) so this is going to be the same for Galloway as well, I would assume. I'm just trying to shed some light on why you were not able to achieve Galloway's "lowest advertised numbers" because they are a company, they are going to advertise the best numbers they can. Just remember there is a lot of variation in manufactured products.