Finally found a pound of AA1680. Sized the fired cases I had. Damn it's challenging to get any consistency out of this little cartridge. I usually just set my sizer to bump the shoulder but I was getting a wide range of measurements while trying to set the die so I tried to full length size one with the die touching the shell holder just to see and crushed the case. My fired cases are .014" longer than the factory loaded ammo I have. After sizing I'm getting measurements from -.oo1" to -.008" (datum set to zero on an unsized fired case). Unsure what the issue is. Why would these vary so much?