Amazing tech, but is the voice in the second video terrifying with how excited he sounds? I wonder if this can be used to make ships more efficient?
If such bullets pass through flesh without creating such devastating damage, they could be considered much more humane on battlefields and in law enforcement. (Which might or might not be a good thing.)
Too bad these people aren't using their engineering skills to develop better farm equipment, or desalination processes, or anything that could actually improve life on earth.
If I’m not mistaken, the Soviets came out with “super cavitation “ about 20 years ago with their torpedos. I’ve wondered for years why the exhaust gases from an ICE was never channeled to the bow of any vessel to create an air bubble along it’s wet area.
Aiming these projectiles from above the water now becomes problematic, as the refraction of light at the air/water interface varies with the angle of the shot- you'll be aiming at your best guess of where the target is.

I'm sure someone is working on that problem now- as that cannot have passed their notice.
Jerome Morley Larson Sr eAIA
good for police work to stop perps without killing them; a few rounds may disburse a mob.
Another giant leap for mankind.
Michael son of Lester
Interesting... More suited against inanimate targets than people because the cavitating effect prevents the round from imparting serious trauma to a living target.
People saying these may be "less lethal... How can this be?? -

"Super-Cav" bullets (torpedos, boats, etc..) work by creating a far bigger cavitation bubble in the jelly-bag, thus likely being far more lethal than a comparable full metal jacketed bullet, due to the larger dianeter over-expansion compared to the (comparatively) narrow penetration path of a conventional (equivalent) bullet. Their high penetration comes from so much less friction, with the only contact (wetted area) being the tip, while conventional bullets suffer from frictional effects along a much larger surface area, reducing penetration, and resulting in energy being deposited all along the path - this super-cav design will deliver more energy to dense targets (bone) embedded within a mushy tissue bag.. ( Speed of sound in tissue is "on the order of" 1450m/s. which is a lot faster than most bullets - indicating that tissue rebound is a significant factor in conventional bullet penetration / frictional effects....). Who knows, time to go make some laboratory apparatus.
MD, while I wouldn't care to be hit with either type of bullet, the temporary wound channel created in the ballistic gel and obvious energy dump demonstrated by the violent movement of the gel blocks when hit with a conventional bullet suggest more shock imparted. While ballistics is a well understood science mathematically however, it can break down and deliver unexpected results when projectile meets living tissue, so I would not bet money on any outcome.