Ambient casting temperature

[Martini2]

Here's a bit of update on topic. I have determined today that local -25 degrees F. chill factor is to low for mold operator Also for some unknown reason my wife does not think the wood stove in Den (even though it seems to be glowing hot enough) is not suitable for PB casting either. Projectile production will have to wait but thanks to warmer under lube sizer one can stay busy. Best of New Year to all.
RobertB