Sim-X 9mm Defensecore 45gr Lead Free Hollow Point 20Rnd Handgun Ammo

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SIM-X ammunition is not like other ammunition. To understand it requires rethinking what constitutes performance in a round. Get ready to change your understanding of bullets, mass, velocity, and terminal performance.

DefenseCore™ from SIM-X is the first of its kind ammunition for every-day carry, combining hyper-velocity, performance recoil, and optimized on-target, in-target terminal performance when needed most. The patent pending synthetic-polymer core is perfectly married to the proprietary jacket, achieving outstanding performance in all handguns in the areas that matter most. The 9mm offers an astounding 500+ foot pounds of energy at the muzzle… something previously unheard of in most small pistol rounds. DefenseCore™ helps put devastating rounds on target, in critical situations when it matters the most.


The SIM-X SubMass™ core(s) are approximately 80% – 90% lighter than standard lead core ammunition, but with equal or greater impact and tensile strength. Combined with muzzle velocities nearly twice that of standard pistol and carbine rounds these SubMass™ projectiles are light weight but have heavy impact. All of this is accomplished without firearm modification or the need for +P pressures.

SIM-X proprietary synthetic core is a heavy-duty viscoplastic material that behaves as a solid but has the characteristics of a non-Newtonian fluid. The result is a lightweight, SubMass™ projectile that achieves a better gas seal in the bore. This translates into very high velocities combined with perfect control over penetration and expansion, cycling the firearm without the need for weapon modification or +P pressures.

The Kinetic-Ceramic core is 10X stronger than lead with a polymer matrix that produces flexible properties. These properties create a projectile that achieves a better gas seal in the bore, allowing significantly higher velocities. Additionally, SubMass™ technology cycles firearms smoothly and effectively and without modification or +P pressures.

SubMass™ core technology yields an additional important benefit, namely weight savings. 50 rounds of SIM-X .45 ACP are approximately 53% lighter than the same quantity of standard 230 grain .45 ACP. The advantages of lighter ammo are obvious, but here’s what our friends in the military have to say about it.

SIM-X SubMass™ bullet technology produces lower recoil. Using our proprietary jacket and viscoplastic or kinetic-ceramic core, we are able to produce very high velocities with an efficiency that avoids +P pressures and the need to alter the firearm in any way.

SIM-X patent pending synthetic and kinetic-ceramic core materials are 100% non-toxic. For LE and military trainers, this means that tens of thousands of dollars normally allocated to bullet trap cleaning and lead recovery/mitigation can be reallocated for higher priorities within their training budgets.

  • Caliber: 9mm
  • Lead Free
  • Bullet Weight: 45 gr
  • Rounds per box: 20
  • Muzzle Energy: 505 ft lbs
  • Muzzle Velocity: 2250+ fps
WARNING! Please read restrictions before ordering.
  • Nexgen Outfitters does NOT accept returns of any firearms or ammunition.
  • Handgun ammunition buyers MUST be 21 years of age or older.
  • Rifle and shotgun ammunition buyers MUST be 18 years of age or older.
  • You are responsible for choosing the correct ammunition for your firearm.
  • ALWAYS check your local laws for any other regulations that may affect your purchase or possession of a firearm/ammunition before ordering any firearms or ammunition.
Bullet Type:
Hollow Point
Gauge or Caliber:
9mm Luger
Muzzle Energy:
505 ft lbs
Muzzle Velocity:
2250+ fps
Number of Rounds:
Sub Category: