I bought a bore scope last year. Big mistake since, at 10X, every standard factory barrel looks like it was machined with a hatchet. Some are so bad looking, you think that you can't even hit the ground. With just a light, you can't see anything wrong. As stated above, if you want to sleep at night, don't use a bore scope. You will find you want to take pictures and send them to every rifle manufacturer. I'm sure the high end custom barrels look much better, but the factory barrels on some of my expensive rifles are still disturbing to look at.