Sightmark laser bore sight pays for itself - Sightmark Laser Bore Sights

I purchased the Sightmark Laser Bore Sight in order to boresight several Marlin and Winchester 30-30s. Initially, I clamped a rifle with the sight in it to a table and zeroed at 50 yards. Clamping isn't really necessarily, but it helps a bit. As I used it in other rifles, I began zeroing in the house at around 15 yards - aiming from one room into another. It's simple, reliable, and works well for initial sighting. I found it was typically around 2-3 inches off of range sighting, but getting it boresighted in that close saves a lot of shells on initial sighting-in. The advertised battery life is one hour, but the batteries that came with it didn't last that long. The batteries aren't expensive, though, so it's not really a problem. I did find that as the batteries got weak, it was hard to see the dot in bright sunlight. Overall, a simple and inexpensive product for boresighting.
Pros: Simple and Effective
Cons: Short Battery Life

This review was written in the old system and had content requirements that are different than reviews written today.