Thanks for the info.I sure appreciate it..I went thru a similar deal with an old 38-40 and made my own sizer out of a 7/8ths hardware grade bolt. Then lubed with a cooking cutter type deal. These.379 bullets, I can force push them into a fired case if I start them and then push them against the side of the bench. So I am thinking the fired case is just about .001 smaller.
Lee will make you a sizing die for any diameter you want for about $30. I already checked in to that.
I figure I have these .381 bullets coming and I can size them down if necessary with one of the Lee sizers. Worse comes to worse, I can make my own sizer . I have adjustable reamers. One thing I can't control though is the hardness. The guy I am buying the bullets from might be able to vary the hardness too. I can probably find a caster in our gun club as we have about 1200 members