It was actually pretty much spotless imo, a bit of dirt in the bottom of the buckets, i finally got all i could, another 700lbs worth. I got the rest for $1/lb on the basis i took it all.
Ive been casting 9mm and .45 as a 3:1 pure lead/lino mix. So far the bullets are coming out great. Probably a little harder than needed, but ive literally got 2 tons of lead to go through now.
Unless you're getting "pure lead" cheap as well, just go for wheel weights. With wheel weights I mix 10% lino or pewter. Gives me a 20-22 BHN measure which is just fine for anything under 2000fps with good lube.
By the way, it's frowned upon by several here but I go to my local hardware store and pick up the toilet seal rings that are the cheapest. They aren't pure beeswax anymore but they do contain petroleum jelly to keep whatever is in them fairly soft. They melt down easily and make a great bullet lube that doesn't leave any hard to clean residue behind. For some reason bullets with gas checks work best with this lube. I have also been melting it down and mixing it with Safflo vegetable oil for patch lubricant on muzzle loaders. It's every bit as good as Spit Patch.
I find "pure lead" tough to find at decent prices. Most of what people are selling is a mix of scraps.
Also, I don't worry about wheel weights with zinc in them if I'm only plinking paper. If I'm going to hunt with the bullets, I'm much pickier and use my hoarded stock of pure lead with a 20% mix of lino or pewter. Unless I'm hunting with a muzzle loader where I use pure lead for everything along with a patch, even with maxis. Cloth patches don't work well with maxis so I use paper.
I'm off topic here. Sorry.
If you're plinking, that lino you're blasting down range can be turned into cash or make wheel weights and lead go a lot further at much lower cost. If cost isn't an issue IMHO the pile of lino you picked up is a one off occurrence. Those finds are few and far between. The last BIG batch I picked up was appx 300 pounds and that was several years ago. Now, I check out the junk shops and places like Value Village and the Thrift shop for Pewter mugs for a buck apiece. Pewter has at least 85% tin, usually more with a bit of copper and antimony and some other trace elements which does exactly the same thing as linotype.
I did a fair amount of cast lead shooting before with so so results. Consistency was a big problem.
Some of the replies from folks like jethunter and a few others contained some very good information that directly related to what I was doing wrong. It became quickly apparent that if you wanted consistent accuracy with lead bullets you have to have consistent bullets. I found that as long as diameter was a few thousandths of an inch over bore diameter (maybe a bit more but not less) accuracy would be good. Then I had to figure out why accuracy would change from lot to lot. Of course, consistent hardness was the biggest albeit not the only factor.
I also found that when cartridges were designed for black powder and the rifles they were being shot in were meant for black powder, then use black powder for the best results.
I'm sure there will be a lot of differing opinions.
I've been looking for a .360in or slightly larger hollow base mold for a long time. Even a wad cutter will work. Some pistols and rifles just shoot better with hollow base projectiles.