I never lark's headed any of these (although some may have). I simply put the loop over the screw head, turned the screw down till it barely touched the loop, leaving it so the loop could turn. Then I pulled the rubber cap back over the tip. This (the rubber cap) will prevent the loop from coming off of the screw, and allows the loop to turn right or left, without binding.
As for that burr, those holes are punched, not drilled. That's why they are so rough. < handle with caution >