Well, that's the whole point for experimentation.
Everyone says no, not reloadable, etc...., but I say why not or how and when will they fail?
I don't size the aluminum or steel any differently than the brass. I don't polish the cases, just inspect and make sure they are clean. They process with as much ease as brass cases for me. They don't damage the dies and they grip the bullet just like brass cases do. Yes, I realize the properties of steel and aluminum aren't conducive to repeated working, but I find brass and nickel-plated cases fail just as often. In fact, I had some older Remington brass with a 88gr JHP in 9x19mm (presumably some old factory ammo, since I rarely load one bullet with all the same headstamp) and all split upon firing them. Likely, the cases will be lost before they fail, unless you have 100% ability to reclaim all of your fired cases.
From a safety standpoint, I'm not loading most .45 ACPs very hot and they are relatively low pressure to begin with (vs. 9mm and most other pistol/rifle calibers). This is not done to entice others to do it, but simply to find things out for myself. With the availability of boxer-primed brass cases in about all pistol and rifle calibers, it doesn't make a lot of sense to substitute with aluminum and steel, but it can be done.
Don't ask me how many steel-cased 7.62x39mm I've reloaded (at least until my stash of berdan primers were exhausted).