Re: Optical bore sighter, thoughts?
I use the Sweany,"Site-A Line", optical bore sighter by the Allen Supply Company of Gardernivlle, Nev. I find it to be a excellent ( the best) bore sighter I own. I have many other brands but this is the one I always use now.
My unit has the " X " type crosshairs for alignment which I recommend. I have come as close as 1" from the center of the target at 100 yards and that's no BS.
You do have to purchase a separate spud for each caliber. There are longer spuds available also. I forget the the prices.
I know that alot of the members recommend bore sighting through the barrel as quick, easy and inexpensive and that's true. But you can do this job in the comfort of your work area and out of the elements ( Winter, snow, rain , wind, etc). Also , you will be able to detect gross misalignment in your sighting system right then and there and also read out total available travel of your adjustments.
I highly recommend checking this unit out.