I was recently at local gunsmith and he checked bore on my rifle. But, to my surprise, he didn't use one of those borescope devices with long tube and eye piece, but little lens with a light, attached to flexible cable and plugged into bit larger cell phone. Looks to me noted setup that shouldn't cost arm and leg, unless high end cell is required. Then I checked on internet, and from what I could see, very nice setup could be purchased for just 20-40 dollars, see https://www.walmart.com/c/kp/cell-phone-borescope .
Anybody knows more or has personal experience with such borescope setups?
Anybody knows more or has personal experience with such borescope setups?