On the left is Hornady's 147gr .355" XTP jacketed hollowpoint, a bullet not known for enthusiastic expansion at subsonic velocities. Shoved out of a 5.5" .357SIG barrel at about 1240 feet per second and this one expanded okay, even through four layers of denim. It penetrated a little over eighteen inches of Clear Ballistics gel, coming to rest a little ways into the second block.
The 125gr Remington Golden Saber Bonded .357SIG projectile on the right did likewise.
Thing is, though, so did several 9mm 124gr +P Federal HST bullets.
Maybe the .357SIG would have performed better than the +P 9mm through auto body sheet metal or windshield glass? Don't know, but these two bullets did pretty much the same thing in gel covered in four layers of denim...
