A little history then a question. In both a 44 mag S&W and a 45acp S&W they have come out the cleanest shooting swaged lead bullets. Just a light brush and all new. Obviously soft lead, slugs up straight away and seals the throat, then on to the barrel. No leading in the throats, forcing cone , or barrel. Not so shooting any kind of hard cast. Lead in all those places. So my thought is we down size the bullet going into the barrel, why not give it a light down size right at the throats. Take my 625, throats have been match honed to .452. , barrel is just a tick over .4505. Would it present a major problem of any sort to size my bullets at .453, then seat them close to or touching the taper from chamber to throat? It seems that upon firing the throat would be sealed straight away with a sizing from .453 down to .452, then business as usual. I know this goes against the old golden rule of a finger push snug fit in the throat. I don't care about stepping on traditions toes but I wonder if I am missing anything important. I would down load just a bit just like j bullets jammed into the lands in a rifle. Anything else I am missing??