204Ruger

Whats the best working boresight tool you have used.

These have been used forever
https://www.bushnell.com/additional-pro ... 43333.html

Then lasers
https://www.bushnell.com/additional-pro ... fkDg-cPk5H

I'm always swapping optics around.

I use the Wheelers laser bore sighter, Midway has them IIRC, big magnet on one end, place it on the muzzle, and will get you on paper 99% of the time if you do things right. Easy to use. I've had mine for several years, same battery that I remove after use. I don't swap out scopes very often.

I bought the Feyachi bore scope tool at Walmart. Comes with various bore diameter fittings, easy to operate and gets me on paper very easy, for final tuning of sights/retical.