No one, at least I'M, not recommending that anyone do anything. Everyone makes their own decisions based on their own experiences and abilities. There is a tendency for some to get on their horse and look down as if learning and experimenting is a bad thing because it doesn't fall into whatever their standards are. If you feel queasy about it, don't do it. There's a pretty good chance that if I blow a gun, you're not going to get hit by any of the shrapnel. This was an interesting topic for me and I learned a lot about the engineering and history of the use of different materials for cartridge construction in a hands on way. I shared it here because I know there are a lot of people like me on this forum who are curious about things and like to build off of others knowledge base. And yes, you are certainly right about the availability of brass cartridge cases, I have enough to last ten life times. But, having just come through the desert that this hobby has traveled through, you would have to be in denial big time to think that everything will always be available. You can't say that the ability to load aluminum might not be the difference between being able to shoot or not. I've been reloading for a long time, since 1975, and I've seen a lot of good and bad, safe and unsafe and really unsafe and I like to think I've learned from all of it so excuse me if I get a little miffed when people get preachy about what I'm doing, especially when it offered up in a way that doesn't add to the conversation.