WestKentucky
Member
I see 2 (actually 4) ways to load wadcutter or hollow base wadcutter ammo. I usually see the bullet seated flush with the top of the case and roll crimp applied. I have also seen them loaded protruding slightly from the case and crimped in place. Then analogous to these are the "upside down defense" loads which are seated similarly. How are they supposed to be loaded, and what actually determines COAL? Is it case length, cylinder impact position, or some other factor?