Introduction
Discover the Cutting Edge CuRx, a lead-free bullet engineered for rimfire enthusiasts who prioritize precision and eco-friendly performance. Launched by Cutting Edge Bullets in 2020, based in Boise, Idaho, the CuRx meets stringent lead-free regulations, such as those in California, with its monolithic copper construction.
Renowned for its near-100% weight retention and consistent terminal performance, the CuRx delivers reliable results, making it a top pick for ethical shooters targeting small game. Its robust design ensures reliability across diverse shooting conditions, from plinking to varmint control.
- Caliber Range: Focused on .22 LR, with diameter of 0.223 inches, supporting standard .22 Long Rifle cartridges.
- Weight Options: Spans 32 to 50 grains, with variants like 32-grain for standard twist, 42-grain for faster twist, and 50-grain for ultra-fast twist.
- Hunting Focus: Optimized for accuracy and minimal fouling, ideal for small game and varmint in varied environments.
Technical Characteristics
The Cutting Edge CuRx is crafted for shooters seeking durability and precision in rimfire applications. Its advanced monolithic design ensures top-tier performance.
- Monolithic Copper: Made from solid copper, ensuring near-100% weight retention with no core-jacket separation, even on tough targets.
- Pointed Design: Features a streamlined profile for improved ballistics, achieving consistent flight at velocities typical for .22 LR.
- SealTite Band: Includes a patented band to reduce fouling by 15-20% compared to lead bullets, enhancing barrel longevity.
- Velocity and Range: Optimized for muzzle velocities of 1,000-1,300 fps, effective to 100+ yards with stable trajectories.
- Reliable Feeding: Lathe-turned profile ensures smooth cycling in bolt-action and semi-auto rifles.
Reloading requires precision, using standard .22 LR dies and compliant lengths to manage pressures. Maintain case neck tension (0.002-0.004″) for optimal accuracy, as the CuRx’s rugged design excels in varied uses but demands careful load development.
Ballistics and Performance
With G1 BCs ranging from 0.105 to 0.214, the CuRx offers solid stability and resistance, supported by sectional density for consistent penetration. Field tests show the 42-grain CuRx achieving sub-MOA at 50 yards with low ES/SD from appropriate twist barrels. The 32-grain is ideal for plinking and small varmints, while the 50-grain excels for longer-range small game, retaining energy to 100 yards.
The Expert Ballistics Table below lists key CuRx variants from Cutting Edge specifications, sorted by weight. BCs are G1; verify on Cutting Edge’s site for updates.
| Diameter (inches) | Weight (grains) | Ballistic Coefficient (BC) | Sectional Density |
|---|---|---|---|
| 0.223 | 32 | 0.105 | 0.091 |
| 0.223 | 42 | 0.187 | 0.119 |
| 0.223 | 50 | 0.214 | 0.142 |
Groups of 0.5-1.0 MOA achievable; excels to 100 yards with proper shot placement.
Comparison Bullets
The CuRx competes with lead-free rimfire options like Lehigh Defense XD (developmental solid copper) and Barnes Varmint Grenade (frangible copper), followed by Hornady NTX (polymer-tipped lead-free), Nosler Varmageddon (similar lead-free), and Lapua (no direct .22 LR lead-free). Its BCs (0.105-0.214) match Hornady NTX (around 0.120-0.150) but trail developmental Lehigh for potential penetration. The CuRx’s solid design retains weight better than frangible Barnes, with consistent flight at low velocities (1,000 fps) versus Hornady’s expansion focus. Against Lehigh XD 28gr conceptual, the CuRx 32gr offers similar eco-friendliness; versus Barnes 36gr Varmint Grenade, it penetrates deeper but fragments less. Advantages: reduced fouling, precision machining. Drawbacks: requires specific twist rates, higher cost ($0.20-$0.30 per bullet).
| Bullet | Diameter Range (inches) | Weight Range (grains) | BC Range | Key Feature |
|---|---|---|---|---|
| Cutting Edge CuRx | 0.223 | 32-50 | 0.105-0.214 | Solid copper, SealTite band |
| Lehigh Defense XD | 0.223 | 28 (conceptual) | 0.100-0.200 | Solid copper, fluid transfer |
| Barnes Varmint Grenade | 0.224 | 36-50 | 0.120-0.180 | Frangible copper |
| Hornady NTX | 0.224 | 30-35 | 0.120-0.150 | Polymer tip, lead-free |
Field reports show CuRx matching Hornady NTX in accuracy but outperforming in fouling reduction, ideal for extended sessions.
Applications and Practical Aspects
Ideal for hunting:
- 32gr for plinking and small varmints;
- 42gr for squirrels and rabbits;
- 50gr for longer-range small game.
Delivers sub-MOA in tuned rifles, ideal for ethical shots.
Reloading
- Load Data: Refer to Cutting Edge’s website for CuRx-specific data, as the monolithic copper design may require adjusted charges compared to lead bullets.
- Starting Charges: Begin 5-10% below standard loads for comparable lead bullets to avoid over-pressure; increase gradually while checking for signs.
- Seating Consistency: Ensure precise seating depths to maximize accuracy, as the CuRx’s surface is sensitive to inconsistencies.
- Crimp Application: Apply a light crimp for secure retention, particularly in semi-auto rifles, ensuring reliable feeding.
- Barrel Twist Compatibility: Match twist rate to CuRx weight (e.g., 1:16 for 32gr, 1:10 for 42gr, 1:6 for 50gr) for stabilization.
- Velocity Check: Chronograph to confirm velocities above 1,000 fps for performance, targeting low spreads.
- Storage: Store in sealed containers to protect from moisture; suitable for all rimfire applications per design.
Conclusion
Cutting Edge CuRx is a premier lead-free rimfire bullet, blending precision machining with reliable performance. Its eco-friendly design and accuracy make it a strong choice for shooters in lead-restricted areas or pursuing small game. Visit official website.
