G2 Research (G2R)'s new Radically Invasive Projectile (R.I.P.) uses trocar edges (that is, edges with three angles that reach one point) for extreme penetration and expansion. G2R claims the bullet acts like a full metal jacket when it contacts a barrier — plywood, drywall, glass, sheet metal — and then expands its energy.
It's designed as a self defense load that should require only one shot to effectively stop a threat. It creates nine — yes, nine — separate wound channels as it expands. At the moment, only 9mm specs are available: