Lehigh Defense Controlled Chaos 22 Caliber 55 Grain Copper HPBT Lead-Free Bullets
- Capacity-Rounds:
- 50
- Style:
- Copper Hollow Point Boat Tail
- Grain:
- 55
- OAL:
- .868"
- Quantity:
- 50
- Core Material:
- Copper
- Jacket Material:
- Copper
- Sectional Density:
- 0.157
- Bullet Diameter:
- 0.224
- Coefficient:
- 0.278
Lehigh Defense Controlled Chaos 22 caliber 55 grain copper HPBT lead-free bullets deliver controlled fragmentation for hunters and precision shooters who need predictable terminal performance without lead. Machined from solid copper rather than formed or swaged, these projectiles are built to fragment at a predetermined depth, creating multiple wound channels and a large temporary cavity while maintaining a separate base for continued penetration along the original trajectory. The result is extensive trauma on target with minimal over-penetration—ideal for hunters who demand clean, reliable performance and shooters operating in lead-free zones.
The Controlled Chaos design originated from animal control professionals seeking a .22 caliber round that would deliver maximum effectiveness at the central nervous system while minimizing pass-through energy. After evaluating copper matrix frangible alternatives, Lehigh engineered these bullets to provide superior penetration depth and particle control compared to conventional lead-free options. The advanced CNC machining process ensures exceptional accuracy shot-to-shot, giving you the precision repeatability reloaders expect from premium components.
Whether you're hand-loading for varmint control, predator hunting, or precision rifle work in restricted-lead areas, these lead-free projectiles combine terminal effectiveness with the manufacturing precision that separates quality reloading components from commodity bullets. At 55 grains, they're built for the .22 centerfire rifles that demand reliable, consistent performance downrange.
Key Features
- Solid copper construction—CNC machined for superior quality control and consistency
- Controlled fragmentation at predetermined depth for predictable terminal performance
- Separate penetrating base maintains trajectory after fragmentation
- Lead-free design meets environmental and regulatory requirements
- Advanced manufacturing yields exceptional accuracy and shot-to-shot uniformity
- Reduced over-penetration ideal for controlled hunting and predator applications
Specifications
| Caliber | .22 (22 caliber) |
| Weight | 55 grains |
| Bullet Type | Copper HPBT (Hollow Point Boat Tail) |
| Material | Solid copper, lead-free |
| Construction | CNC machined |
Frequently Asked Questions
What makes Lehigh Controlled Chaos bullets different from standard lead-free ammunition?
Lehigh's Controlled Chaos design fragments at a predetermined depth to create multiple wound channels and a large temporary cavity, while maintaining a separate base for continued penetration. This addresses the limitations of conventional copper matrix frangible rounds, which often provide insufficient penetration depth and particle control. The solid copper, CNC-machined construction delivers precision and reliability that standard alternatives typically don't match.
Are these bullets suitable for hand-loading and reloading?
Yes, these are reloading components sold as individual bullets for hand-loaders. The advanced manufacturing process ensures exceptional accuracy and shot-to-shot uniformity, making them ideal for precision hand-load development.
What firearms and applications are these designed for?
These .22 caliber bullets are designed for .22 centerfire rifle applications. The Controlled Chaos design was developed specifically for hunters and animal control professionals who need reliable terminal performance with minimal pass-through energy, particularly in situations where shot placement near the central nervous system is critical.
Do these bullets meet lead-free ammunition requirements?
Yes, these are lead-free projectiles, making them suitable for areas with environmental or regulatory restrictions on lead ammunition.

