Originally Posted by
fguffey
Before I learned to reload I had to know what was happening to the case when being sized. I started by scribing lines around the case at the case body/shoulder juncture and at the datum on the shoulder. The scribed lines became artifacts, the artifacts indicated to me I was not pushing the shoulder back, as I sized the case the scribed lines moved toward the mouth of the case; meaning I was not moving the shoulder back while sizing the case. Before that I already knew there was 'bump', bump was a function of the cam over press-only. The non cam over press did not bump.
F Guffey
When I set up my Lee dies for full-length resize, I do it by Lee's instructions.
However, when I'm only neck sizing, I use a black water-based market to color the case neck down to the shoulder. As I adjust the die, it rubs the marker off the neck so I can keep an accurate account of how far down to set the die.
Never argue with an idiot. They will drag you down to their level and beat you with experience.― Mark Twain