So I was prepping a bunch of my 9mm cases for reloading and realized that even after sizing, there is a variation in case lengths. I had cases, sized in the same press with the same die (Lee O-press and carbide dies) that varied from .0742" to .0753". For anyone who has reloaded for a while, does this sound significant? I have separated them by length and will keep everything else the same when I load them up to see if there is a noticeable difference in velocity or accuracy. When using larger calibers with larger cases, variables like these are much less important, but when you're dealing with a cartridge that has a starting powder charge of less than 5 grains of some types of powders, small variables become more pronounced.
"I have always been a soldier. I have known no other life. The calling of arms, I have followed from boyhood. I have never sought another." From The Virtues of War, by Steven Pressfield.
7 years 25 weeks ago, 3:48 PM