Review on Accurately Sight In Your Shotgun With The Sightmark Red Laser Boresight by Mike Meyers

I really want this item to work, but it's not great. The first one I ordered put the dot in about a 18" circle around the target at 50 yds depending on how it was rotated in the barrel. I returned it and got a second one.same problem but maybe a 12" circle this time. I marked the side of the boresight in in 3 different spots, put it in the chamber with the #1 mark towards the top of the gun, checked it in the scope, rotated the boresight so the #2 mark was at the top, checked it in the scope, then repeated for the 3rd mark. I adjusted the scope so that each mark was equidistant from the center of the crosshairs and test fired it - it was dead on.So, I guess it works if you want the hassle of rotating the boresight around and around until you can figure out where the center is, then it might be ok for you. The two I tried just were inaccurate enough that you couldn't set the scope to the laser dot and be done. Not really what I was hoping for, but better than wasting shells.