HC I did some searching and after slugging my barrel I decided to buy a Lee push thru sizing die @ .377". As far as loading I rarely ever produce "hot" loads no matter what I shoot. I always get much better accuracy with less than maximum charges.
With my bore diameter of .376" and using a bullet of .377" I should get pretty darn good accuracy. Probably as well if not better than jacketed bullets.
Lee has designed a neat new set up for sizing bullets. Instead of buying a Classic Sizer Kit for something like $30 you can now buy a Breech Lock Bullet Sizer which is basically the unit that screws into your press for $16 then you can buy different size punches that you put into it at $15 a piece. Man I wish they would have done this a long time ago. It would have saved me a bunch of money.