I just bought some Aluminum case ammo from Bass Pro Shops in 9mm at $18 for 50 rounds (before tax).
I never shoot Al - anything to pay attention to?
I did shoot steel cases and the grime they left behind jammed my magazine spring after like 100 rounds.
This is what they say about it:
CCI® Blazer® Handgun Ammo provides maximum shooting pleasure, for minimum cost, by using aircraft-grade aluminum cases. Loaded with Speer® bullets and CCI primers, Blazer Handgun Ammo functions reliably in all types of handgun actions. A great choice for high-volume target practice.