How did this happen? Never seen it before.

[Big Dangle]

I had a bit more tin in then usual last time I let it cool enough it wouldn't pour and it wasn't very cold lately. Never seen the lead shrink in the pot like that before.

[CLP]

simple case of shrinkage...cold air'll do it everytime.

[Big Dangle]

That's what I thought but it's been around 50, in the shed, hell maybe I just never noticed it.