Sailorman wrote:bullet molders today will drop the bullets directly into a bucket of water, to cool and harden the bullets more so than air cooling does.
Water will, of course, cool hot lead items faster than air will, but water-cooling will not make lead items any harder than air-cooling will.
Make your molds out of aluminum: safer, will last forever, weights will not stick, and weights will cool/solidify in about 10 seconds.
I cast a lot of decoy weights in aluminum molds: they are far and away better than wood molds.
Often wrong, never in doubt...