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Shotgun Shell

Hulls

All Hulls are NOT created equal!
Hulls are the empty container for shotshell components. Although SAAMI standardized the dimensions of shotshell hulls. There are many different variations. High Brass, Low Brass, and Paper, and Unibody are some examples. You have straight and tapered internal walls. What's important is the inside volume. The difference of internal base design is what truly causes inequality. Hull bases increase or decrease the volume by raising and lowering the floor of the hull. It is DANGEROUS to mix reloading data for one specific hull with another.
Shotshell headstamps Shotshell cutaway view of low brass base hull shotshell low brass hull internal base cutaway shotshell hull internal base cutaway Shotshell high brass low brass comparison shotshell tapared hull
shotshell hull 6 crimp and 8 crimp comparison Shotshell hull nomenclature        

 
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These writings and website contain my recollections, opinions, and things I’ve done in the past that have been successful for me. They might not work for you! REMEMBER YOU ARE RESPONSIBLE FOR YOUR ACTIONS!