The only rifle I use a laser boresight on is my 50 BMG. I use a laserlyte and use a target I made to set the crosshairs 28" high at 100 yards. This puts me within a few inches at 1000. I only do this because every round wasted is atleast a couple dollars up to eight or so. It just gives me an idea of where it will hit... Don't sight it in and expect it to be dead nuts on... But it does work for getting close...
" The strongest reason for the people to retain the right to
keep and bear arms is, as a last resort, to protect
themselves against tyranny in Government...." - Thomas Jefferson