Had it not been for the toruble Ihad getting cast to shoot well, I'd have never known that my 44 barrel was 432, as it shot jacketed loads just fine. None of my molds drop anything larger than .431, so I never even found out how well the rifle would shoot with proper size boolits, but it will put 3 of 3 into 1 1/2" at 100 yards all day. These are wtih 265 grian lead boolits of 430-432 in dia. Spend some time with it, you will likely fond the rifle to be a better shooter than the numbers would suggest.
Ditchdigger has the 445 reamer, an exellent upgrade we are told.