The .357 Magnum is the "original magnum," introduced by S&W in 1934. Now, we've upped the payload even further with a 110 grain Solid Copper Hollow Point bullet that expands to double-caliber diameter while deploying six sharp cutting petals within the first inch of impacting soft tissue. The wound cavities from these 110 grain solid copper bullets are impressive! Penetration varies with velocity, which varies with barrel length, but from 4" to 8" barrels, penetration ranged from 18" to 24" with 100% weight retention and double-caliber expansion. Recoil is manageable thanks to the (relatively) light-weight bullet.