What's This ?

[Kawriverrat]

Had a bucket of COWW. I didn't flux as much as I should have because I was primarily casting sinkers.
Any way this bullet is a reject. Can any one tell me what the the two spots might be. Only seen this on 2 other occasions. Could it be zink ?

[Kawriverrat]

Another pic

[Cowboy_Dan]

I don't think it's zinc, probably just "dirt" and such.

[WILDEBILL308]

To me it looks like some kind of inclusion from not fluxing well. Depending on what temperature I don't think the zinc would stay separate.
Bill

[Hardcast416taylor]

If there were no other boolets with these same markings then I would just either chuck it or remelt it again. I`ve seen boolets with similar marks when using a LEE drip-a-matic with a small drip getting into the mold before the lead pour starts.Robert

[Soundguy]

that or ash.

I'd remelt it or plink with that one..

[Dusty Bannister]

What is the surface you are dropping these cast bullets on to? Clean dry cotton, or some residue on a table surface?

[mdi]

Another WAG; mebbe its from too cold a melt cooling in a wrinkle?

[Kawriverrat]

Thanks for replies. My my melt at time of casting was at or above 700 degrees. Works best for my sinker molds I'm not as worried as I was curious. There were some others I cast that came out with these marks but weighed within a 1/2 grain of the others with out this so I will load them.