Roll Crimp vs. Taper Crimp: What's the Difference?
How much hull is needed for a roll crimp? To roll crimp a bullet, you need enough hull to cover the entire circumference of the bullet. The amount of hull needed will depend on the size of the bullet. For example, a .223 bullet will require less hull than a .308 bullet. If you're using a factory round, there should be plenty of hull to work with.