Doubletap Ammunition Defense 38 Special 148 Gr Wadcutter WC. This round virtually has no muzzle flash and is an excellent defensive load with excellent penetration. Specifications for Doubletap Ammunition 38SP148T50 Defense 38 Special 148 Gr Wadcutter (WC): Manufacturer: Doubletap Ammunition Caliber: .38 Special Number of Rounds: 50 Bullet Type: Wadcutter (WC) Bullet Weight: 148 grain Cartridge Case Material: Brass Muzzle Velocity: 875 ft/s Application: Self-Defense Primer Style: Centerfire