I would take a chamfer bit (1" chamfer bit?) and chamfer the holes to allow more room for a tig head or welding rod. Place some brass inside the barrel to flow weld upon, then complete the tapered plug weld. Heat treat the area as necessary. Brazing may also be an option.

My two cents.

Don.

Life is too short to have a 'hate on' for so many things or people. Isn't it?