andrewstj: Someone on another forum (think it was Busta) advised me how to fix that.

Just drill out the center of the breech plug tool with a 5/16" bit until it completely fits over the breech plug shoulder. (drilled mine to a depth of approx. 1/2").

Be careful not to let the drill bit touch the sides of the tool where the lugs are. (It was easy to drill).