Thanks to modern technology, the use of a laser bore-sighting usually makes quick work of zeroing a rifle. Even the older bore sights are not bad and will get you on paper when properly used.
Most pros use a universal laser bore-sighting system that has arbor inserts ranging from .22-.50 caliber. They kind of look like a black thermometer and are about the same size as one. The thin end is detachable; that's the arbor component that varies by caliber insert. That end goes muzzle in.


