Got my swaging die back from Buckshot (Rick) the super machinists. He made a .432 diameter hole in the die body that was perfect.
I mainly wanted this special die to work with an over sized cylinder throat problem with one of my revolvers...but it seems well suited to bump up some bullets as the picture shows.
Observe the .38 special Meister HC round nose in 158 grain weight setting on the Lee Classic press nose punch, it gets gently thrust up into the die body until slightly attached to the ejector stem SWC shape... not fully swaged at this point...just enough to hang from the ejector stem.
Now we lower the nose punch back down enough to slip in a Hornady .44 caliber gas check under the hanging .38 caliber bullet.
Then ram the gas check up into the swage die body against the hanging bullet (now a SWC shape) until it reaches its up ward limit of preset travel.
Then you get a bumped up bullet in size with gas a check, the gas check adds .04 tenths grains to the bullet's weight...which is now a 164 grains in .44 special mode.
Note the Berry 162 grain plated bullet with gas check swaged to its base, the increased weight is 166 grain. However the plated bullet had to have its base tapered before the GC could be applied.
Jim