I've been reading and learning a LOT on this forum. IT IS GREAT, thanks to all you who contribute.
My question is, how long after pouring the alloy do you wait to dump the boolits from the mold? I've read that it should take 5~6 seconds for the sprue to solidify before you cut them, as to avoid a dimple caused by shrinkage, but I haven't been able to find any info on how to know when the boolits are solid enough to open the mold?
I haven't actually started casting yet, but I do have plenty of WW (around 320#) and a couple of molds (Lee TL452-200-SWC and a C312-155-2R). These are aluminum 2-cavity molds.
Thanks for any advice you may offer.