It?s scrap, maybe 1/16? thick for overpowder and 1/8? thick for overshot.

I started making full length for 45acp back when I was carrying it for crawling around S. Texas looking for pigs, and it just became fun and I stuck with it.

If youve got some 475L brass that has small splits in the mouth, it should work fine for shot in a 480, instead of mutilating perfectly good brass.

Trapr