Originally Posted by
rbwillnj
For me, the real question is what size ID do you need to get the desired size of sized bullet. Star Lubesizer dies are undersize versus the marked size, but I'm not sure by how much. i.e. a .357 -pin will not fit in a .357 sizer die, but a .356 -pin will fit, so something less than .001" undersize.
Assuming you are working with unhardened material, I agree with drilling a pilot hole, but after that I would use a boring bar to get the desired size. Really you should harden the die then grind the ID.