I have got 1 down to 1lb 7ozs but I'm pretty sure if was a factory freak, most will not go below 3.5lbs with out firing when closing the bolt. I usually get just over 2lbs but I change the springs before I even start to adjust 99% of the time. Each time you tweak the pull weight screw you will want to fully cycle the bolt hard as hell about 10 times to make sure its not gonna fire when closing easy or hard, or when its jarred. They can be tricky, be extremely careful.