how low have you been able to go with this trigger, ive heard they are set at around 4lbs from the factory, im looking for 2.5 is it possible with this trigger?
Yep. Look up the correct procedure for adjusting a triger and go to it. The main reason for looking it up is safty and the checks involved to make sure you don't get an accedental firing when you're not wanting one. A number of the smiths on here are saying they can make them about as good as any.