Doubletap Ammunition .357 SIG 125 Grain Hollow Point Pistol Ammo 20 Rounds. Boasting the deepest penetrating hollow point for its caliber this bullet will open every time with 100percent weight retention. Customers can expect a consistent 18" in ballistic gel with over .65" of expansion out of a 4" barrel. Specifications for Doubletap Ammunition .357 SIG 125 Grain Hollow Point Pistol Ammunition: Manufacturer: Doubletap Ammunition Caliber: .357 SIG Number of Rounds: 20 Bullet Type: Hollow Point (HP) Bullet Weight: 125 grain Cartridge Case Material: Brass Application: Target Package Type: Box Primer Style: Centerfire Package Contents: Doubletap Ammunition .357 SIG 125 Grain Hollow Point Pistol Ammunition What is Doubletap Ammunition .357 SIG 125 Grain Hollow Point Pistol Ammunition good for? The manufacturer says that it is good for target.Doubletap Ammunition 357S125X: .357 SIG 125 Grain Hollow Point Pistol Ammo 20 Rounds