If you are not sure that the Apollo you have is a safe one, call CVA and be sure to ask them. They can normally tell by the serial number. There was a problem with them in the past with causing injury to people because the breech plug failed.

I've never had to recrown a barrel and to be honest, I am the last person you would want to have working on anyone's rifle with powertools. Metal and me do not agree for some reason.