RE: laser bore sighting
Do any of these devices really work better than the "peering through the bore" method?
My experience is that the old fashioned method is easy and accurate enough for getting the shot on the paper for further zeroing at the range. A gizmo is not needed because in practice, the same number of shots is needed at the range whether I've used a gizmo or done it the old way.
However, it would be handy to have a gizmo that is really accurate enough to confidently check the scope after a rough transport (e.g. airline trip).