Please Don't Judge Me!!
For my first endless supply, I was counting on using 12 oz beverage cans. I found that most beverage cans were to thin (.0045 +- .001) I needed something thicker for my bullet base. So after a weekend of some Rigorous and Intense Research, Eureka!! (they must be the 16 oz Beverages) So far they have been working well @ .007 inch. Not only do I have a growing stack of Aluminum now. I have friends that insist on helping me. I sure do miss them.
16 oz Aluminum Twist Tip Cans