The Underwood .357 SIG 115gr ASP Jacketed Hollow Point from Underwood Ammo (Underwood part no. 118) is a 20-round box of .357 SIG jacketed hollow points. Underwood builds it around the Nosler Assured Stopping Power projectile, which has deep skives in the jacket mouth that create precise reliefs for rapid, consistent, reliable expansion. Underwood says that expansion assures energy transfer and stopping power while limiting the likelihood of over-penetration. The 115-grain bullet leaves the muzzle at 1,550 fps with 614 ft-lbs of energy by Underwood’s figures. It is a 115-grain option for .357 SIG pistol shooters.

Key Specifications

• Chambering is .357 SIG, the cartridge designation Underwood prints for this load.
• Bullet weight is 115 grains, the projectile mass Underwood lists for this load.
• Bullet construction is jacketed hollow point, a design that expands on impact.
• The bullet model is the Nosler Assured Stopping Power (ASP), whose jacket skives are meant to enhance expansion without sacrificing accuracy or reliable feeding.
• Muzzle velocity is listed at 1,550 fps, the figure Underwood publishes for this load.
• Muzzle energy is listed at 614 ft-lbs, Underwood’s published number for this load.
• The case is nickel-plated brass, which Underwood says improves feeding and corrosion resistance and keeps the case from tarnishing in storage.
• Box quantity is 20 rounds, the number of loaded cartridges in the box you receive.
• The G1 ballistic coefficient is 0.109, Underwood’s published figure for how well the bullet holds its speed in flight.
• Bullet diameter is 0.355 inch, the measurement Underwood lists for this projectile.

Frequently Asked Questions

What is the ASP bullet in this load? ASP stands for Assured Stopping Power, a Nosler projectile that Underwood uses in this load. Deep skives in the jacket mouth are designed to give rapid, consistent and reliable expansion without hurting accuracy or feeding.

How many rounds come in the box? The box holds 20 loaded .357 SIG rounds.

Can I shoot this load through a suppressor? Underwood lists this ammunition as safe to use in a suppressor.

Buy the Underwood .357 SIG 115gr ASP Jacketed Hollow Point Ammunition, 20-Round Box

A .357 SIG hollow point earns its keep when expansion and feeding both behave, and the ASP skives are aimed at exactly those two jobs. Order from our Lubbock, Texas gun shop for fast, insured shipping, and see the rest of our handgun ammunition selection.