bozo699
Gold $$ Contributor
Actually if your die sizes the neck a lot then the expander pulls hard back through the neck it will lengthen the datum, .020 would be extreme but I have seen movement. Lube works wonders even if the die is over sizingAre you saying the measurement from the cartridge base to the shoulder datum is 20 thou longer ?
Something does not make sense. Dies do not make he CBTD longer by 20 thou. Cartridge OAL I can see, but a longer shoulder measurement ..... not so much. But I guess anything is possible.
Before pic with measurement methods in place (e.g., show what and how you are measuring cases with) and after with the same measurement methods in place would be helpful.
Wayne