Thanks for clearing that up for me! Do you find the lead bullets spring back at all the way you have described jacketed bullets doing?
Welcome.
Soft lead alloy bullets might have no spring-back and stay at the nominal size of the sizer.
My hard alloy (BHN 25) springs back by 0.001". I push them through a 0.460" sizer die and they come out as 0.461". That is a happy thing.
Most .458 WinMag rifles have a groove diameter of 0.459". SAAMI standard is 0.458" MINIMUM groove diameter, so 0.459" groove diameter is "in spec."
Again, thanks for all the help. Lots of new territory for me on this project. Not quite ready to start casting my own but the number of .416 cast bullets available seems pretty decent and most are pretty heavy.
