BTT.
Waiting for some .399 swaged paper-patched bullets I scammed off of a guy to play with until I get a mold worked out...
Gonna try them in the .410 plastic hulls. They have a smaller ID.
The folks at Dixie Slugs tend to think the shoulder is a good idea if the bullet is ever to be loaded in standard hulls. It's somthing for the roll-crimp to set on...