I’m assuming the answer is to drill a slightly smaller-than-.45 deeper bore, deep enough to allow the touch hole flash to access the powder charge. Questions include
* how much further to the rear of the touch hole do i drill?
* what’s the recommended powder charge for this beast?
* how deep does my bore elongation have to be to contain that powder charge, so that the ball doesn’t contact the reduced-diameter chamber?
I hope all this is clear enough, including the photos. It’s probably a simple fix, but it’s better to ask first instead of after. Thanks!