Time to put my new scope on today and i was dreading the tedeous sighting in process with no bore sight to hand. However i happened to have a laser for my .22rf so i mounted it to the barrel of my .223 and set it according to my old scope. Old scope off, new one on and zeroed it to the laser dot. Perfect, new one on, zeroed in a couple minutes and not even fired a single round . Them lasers aint expensive either, get them on ebay for the cost of a box of good ammo.