Went to the range yesterday, ran 50 rounds of Blazer Aluminum .45ACP thru my Kimber, and took a good look at the gun to see how dirty it was. Just a bit of residue around the muzzle and on the slide at that end. After 1 mag of WWB, it looked like I dropped the muzzle end in the dirt, and got worse from there. People like the WWB because it's cheap, but there are plenty of options for cheaper/cleaner ammo (Walmart, when they have it, has Federal in the maroon box for about $17/50 rds...WWB is about $34/100 rds.) I probably won't stop buying WWB, but if there's cheaper or cleaner available, I'll go with that. If/when I start loading my own, I'll stop getting the Blazer Aluminum.