Works well but it's difficult to insert. You can't feed it in like a cartridge or snap cap because it's jams. If it had a round tip like a cartridge or snap cap it could be fed into the chamber using your guns loading mechanism. Instead you have to insert it manually with your fingers which is hard to do.The bore sighter I received was calibrated very well, within 2 MOA at 100yd. This saved lots a rounds trying to get on paper then getting zeroed. I highly recommend this to any one with or thinking about getting a 350 Legend for hunting. It will save you time and money.Works great. Easy to use and Im sure ill get many years of use out of it. No regrets.Didn't like the thick beam from the laser.Shows mocha higher than actual shot placement. Could not get me on paper at 25 yards