Has anyone ever filled a hollow point bullet with Hg or it an old gangster's wive's tale?
I figured someone here would have a better answer than "uhh, just use more bullets..."
From the few videos I watched on gootoob, the mercury appears to splatter into a mist when a solid object is hit. Many of the videos showed a "cloud" compared to a non-mercury bullet. Hg "boils" at 675°F, so I don't think it is vaporizing out of the hollow point before it reaches the target although it is plausible some is expanding out of the cavity as the bullet heats up.

Think an old-style thermometer. I didn't see any "high-speed" videos nor did I look. But it would appear mercury doesn't retain enough mass to "explode" out of the hollowpoint. It is about as the same mass as lead...
I will caution that Hg is easily ingested into the lungs, and that NONE of the gootoobers had ANY kind of respirator or mask on considering the vaporization/minuscule splattering it was incurring.

It will also evaporate at room temp so it is important to clean up spills quickly and properly. Smaller droplets will evaporate more quickly but they will easily coalesce into bigger drops.
A couple vids they even melted the Pb out of the bullet and filled it with Hg and sealed the cavity. Some suggested a heat check, most used wax.
Mixed with certain chemicals it can become an even more lethal poison. I thought this
WIKI was interesting... It absorbed into her skin THROUGH her latex lab gloves!
I'm not planning on doing any experimenting with Hg. I do have a bottle to refill my carb synch stack and a couple old-time T-stats with ampules of it. I've owned cars with mercury switches for the trunk light.

If I were to experiment, I would just use W in a JHP bullet. It is more dense, heat-resistant and easier to work with.