As a follow up and exploration of the web pertaining to the "David White gunsmith" link....... Here is an interesting site, it is about T/C single shots but the tech articles also relate to any break open single shot. He might have some answers to questions we all have about our beloved Handi's. Such as throat diameter and alignment, etc. Take a look. His name is Mike Bellm and does gunsmithing on the T/C's.