Unfilled “crushed” top

[7000grain]

How to fix it
1. Pre-crimp depth
This is the biggest issue.
You want the folds formed clean BEFORE final crimp.
Adjust the pre-crimp station down slightly until:

   •   Folds line up with original factory creases
   •   No random buckling

2. Final crimp depth
Lower the final crimp just a hair.
Goal:

   •   Flat top
   •   Slight factory-style dimple
   •   No hole in the middle
   •   No dishing

3. Stack height
Bad crimps usually mean wrong wad or shot weight.
If it caves in → too much room
If it bulges → too tall
Fix with:

   •   Correct wad
   •   Add/remove shot weight
   •   Use filler if needed (cork card, etc.)

4. Hull condition
Those look reused a few times.
Old hulls:

   •   Don’t fold clean
   •   Hold memory poorly
Use fresher hulls while learning.