I wouldn't mess with the trigger pull. My draw weight is 185 lbs, I expect it to be harder than a rifle trigger, there is a lot of pressure pulling on that trigger mechanism. That trigger is the only think holding back all that draw weight on a crossbow, it isn't the same as a firearm trigger. You get to messing with that the thing and it could go off when you do not want it too, a very dangerous situation. At the very least ask a technician at your bow shop.