On a rough, I figure about 70% yield after smelting. 100# raw = 70# ingot. I count on loosing 30% to clips, iron, zinc, and other junk in the bucket. It's not accurate--but it's a safe average. Keep in mind where you are though. A lot of guys are seeing more and more zinc and iron in their buckets. I get very few still--for now.
"Why is is called Common Sense when it seems so few actually possess it?"
Guns only have two enemies: Rust and Politicians.