after a little thaught i think you have a gun that was realy desighned to shoot 410 but to be a leagal pistol it had to be rifled and be able to fire a pistol cartridge.the 45colt 410 barrels have a bore that is slightly wide for 410 although it works well.your 44 barrel would be narrower and work better for 410 but to chamber 410 the chamber would need to be loose therefore you will have split cases.CHECK WITH TC

BE SHURE TO CHECK MY THEORY WITH OTHERS!!!