Eh, I personally think those would pretty much have horrible terminal ballistics. Aluminium fractures rather than being malleable so "blow ups" rather than penetration would be way to common. Especially from such a light bullet. I'd have to see some serious penetration tests with harder contact than ballistic gel before I'd put any faith in that bullet. Also, with such a light bullet, downrange performance would be near nil since it would have little to no momentum even with those high predicted muzzle velocities.