Learned a very important lesson tonight.
The 300 Whisper/Blackout is a very short case.
I did 1,000 pcs of brass for a customer and when he went to load them he ran into some issues.
When he ran them into his Forester resize die he was tearing the necks completely off. Not good.
I tried to figure out why, but was stumped. All the brass gauged good before I shipped it.
After some stressing and fretting, I figured it out.
If you have the expander ball adjusted too high it can end up in the neck portion of the die. Now you have the die trying to squish the neck down and the ball trying to expand it out. The poor case gets stuck in the middle.
Just a public service announcement...