After the Test: My Review of Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane
My quest for a versatile magnification optic for extended range shooting led me to the Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane. As a long-time shooter who values precision across various platforms, I was intrigued by the promise of an FFP reticle offering consistent subtension at any magnification. I needed a scope that could transition from precise target acquisition at distance to more dynamic shooting scenarios without requiring constant mental recalculation.
The initial impression of this Nikko Stirling optic was one of solid, functional construction. It felt substantial without being overly cumbersome, hinting at robust build quality suitable for the rigorous environments I often find myself in. I had been considering several other scopes in this price bracket, including some from other established brands, but the FFP feature on this particular model stood out as a critical differentiator. My immediate feeling upon unboxing was one of cautious optimism, a hopeful sign that this optic might finally bridge the gap between capability and affordability.
Real-World Testing: Putting Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane to the Test
First Use Experience
My initial testing grounds were the familiar 300-yard benches at my local outdoor range. I mounted the Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane onto a .300 Win Mag rifle, a caliber that demands a reliable optic. The process of sighting in was straightforward, and I was pleased to find the reticle clear and easy to engage with.
Under clear skies and mild conditions, the scope performed admirably. The zoom ring offered positive engagement through its full range, and the parallax adjustment, while stiff as noted, allowed for sharp focus. The true test, however, came after about 40 rounds; the scope consistently held zero, a crucial indicator of its internal robustness for a heavy recoiling rifle.
Extended Use & Reliability
Over the subsequent months, this Nikko Stirling optic has seen more varied use, including extended plinking sessions and even a day at a long-range steel plate event. It’s remained mounted on the .300 Win Mag, enduring regular trips to the range and being transported in a padded rifle case without issue.
Durability has been a mixed bag, though. While it has maintained its zero admirably, the knobs have remained stubbornly stiff. The elevation and windage turrets require a firm grip and a deliberate twist, and the parallax knob is particularly challenging to turn, often necessitating a strong grip that feels precarious. Despite this, there are no visible signs of wear like cracks or significant scuffing, suggesting the internal mechanics are holding up better than the external controls might indicate. Maintenance has been limited to lens cleaning with a standard optic wipe and microfiber cloth.
Breaking Down the Features of Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane
Specifications
The Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane presents a robust set of specifications for its intended purpose. Its 50mm objective lens diameter is designed to gather ample light, crucial for twilight conditions or spotting targets at extreme distances. The 6-24x variable magnification range is versatile, allowing for detailed observation of distant targets and broader scanning when needed.
The 30mm tube diameter contributes to a stronger optic with greater internal adjustment range compared to smaller, 1-inch tubes. Its First Focal Plane (FFP) reticle is a key feature, meaning the reticle size scales with magnification, allowing for consistent subtension calculations at any zoom level. The Skeleton HMD reticle itself is designed for MIL-based adjustments, with 0.1 Mil Rad adjustment click values that provide fine-tuning capabilities.
The scope boasts a wide field of view, ranging from 4.5 to 18.3 ft at 100 yds, which is generous for its magnification range, especially at the lower end. Eye relief is a comfortable 3.5 inches, providing adequate space for the shooter’s eye. The optical system features fully multi-coated lenses, designed to maximize light transmission and reduce glare, enhancing image clarity.
Constructed from aircraft aluminum, this optic is built for resilience. It also features weather resistance, is waterproof, and shockproof, ensuring it can withstand the elements and recoil. The side parallax adjustment, with a range from 10 yards to infinity, is a welcome feature for maintaining target clarity at varying distances. It includes both red and green illumination for the reticle, powered by a common CR2032 battery.
Performance & Functionality
In terms of its primary function – providing a magnified, clear image – this optic performs adequately. The glass is reasonably clear, especially at lower magnifications, offering decent target definition. The 6-24x magnification range certainly delivers on its promise of bringing distant targets closer for identification.
However, the optical quality, while acceptable for the price point, shows its limitations at higher magnifications. Targets can become slightly soft or lose crispness beyond 18x, a compromise that is noticeable when precise shot placement is critical. The Skeleton HMD reticle is functional, and its FFP nature is a significant advantage for accurate holdovers and windage corrections.
Design & Ergonomics
The Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane has a rugged, no-nonsense design. The matte black finish is understated and practical, reducing glare. The well-sized target turrets offer a decent surface area for grip, though their stiffness is a notable ergonomic challenge.
The side parallax adjustment turret, while conveniently located, is particularly stiff. This stiffness makes fine adjustments challenging and requires a very firm grip, which can sometimes lead to over-adjustment. The FFP design is inherently functional, making the reticle an integral part of the aiming system rather than just a superimposed image.
Durability & Maintenance
Based on my testing, the internal durability of this scope seems quite good, especially considering its exposure to the recoil of a .300 Win Mag. It has held zero consistently, which is a testament to its internal construction. The aircraft aluminum body feels robust and has resisted superficial damage from moderate handling.
However, the external controls, particularly the turrets and parallax knob, present a potential point of concern for long-term usability. Their stiffness, even after some use, suggests they might become a persistent annoyance or, in extreme cases, a failure point if subjected to constant manipulation or extreme temperature fluctuations. Cleaning the lenses is straightforward, and the scope’s sealed construction ensures internal components are protected.
Accessories and Customization Options
This Nikko Stirling scope comes with the essential components for immediate use. It includes a CR2032 battery for the reticle illumination, which is convenient. The lens caps are functional, though perhaps not the most robust or quick-access design on the market.
While the scope itself offers internal adjustments, customization beyond mounting rings is limited. The primary “customization” comes from the versatility of its FFP reticle and MIL adjustments, which allow for a high degree of personalized aiming solutions when paired with appropriate ballistics data. There aren’t specific aftermarket parts like custom turrets or specialized add-ons directly from the manufacturer that are commonly available for this model, beyond standard scope rings or aftermarket flip-up lens covers.
Pros and Cons of Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane
Pros
- First Focal Plane (FFP) Reticle: This is the standout feature, ensuring consistent subtension at all magnifications for accurate holdovers and range estimations. It makes shooting at various distances far more intuitive and precise than second focal plane optics.
- Robust Magnification Range: The 6-24x variable magnification offers excellent versatility, suitable for both precise long-range shots and more general observation.
- Solid Zero Hold: It has proven to hold zero reliably, even on a heavy-recoiling rifle like my .300 Win Mag, indicating good internal construction.
- Good Light Gathering: The 50mm objective lens provides a bright image, particularly at lower magnifications, aiding in dawn and dusk shooting.
- Durable Construction: The aircraft aluminum body and weatherproof design suggest it can withstand harsh conditions and hard use.
Cons
- Stiff Turrets and Parallax Knob: The elevation, windage, and especially the parallax adjustment knobs are uncomfortably stiff. This makes fine adjustments difficult and can be a significant ergonomic drawback.
- Optical Clarity at High Magnification: While acceptable, the image quality degrades at the highest magnifications (above 18x), becoming less crisp and defined.
- Parallax Knob Stiffness: The parallax adjustment knob is exceptionally stiff, requiring significant force to turn, which can lead to unintentional scope movement.
- No Battery Included (as per user feedback): While my unit came with a battery, other users have reported it arriving without one, which is an oversight for immediate use.
Who Should Buy Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane?
This optic is best suited for precision rifle shooters and long-range enthusiasts who prioritize the benefits of a First Focal Plane reticle without breaking the bank. It’s a strong contender for those who engage targets at varying distances and need a consistent aiming system across their magnification range. It’s also suitable for hunters who require precise holdovers for medium to long-range shots, provided they can tolerate the stiffness of the adjustments.
Those who absolutely require crystal-clear optics at the extreme end of magnification, or those who demand buttery-smooth turret adjustments for rapid dialing, should likely look elsewhere. Shooters who prefer Second Focal Plane (SFP) reticles or who have hand strength issues might also find the stiff turrets problematic. For users who plan to mount this on a rifle where the parallax knob will be adjusted frequently and rapidly, it may prove frustrating.
For those who do opt for this model, investing in high-quality scope rings that allow for precise alignment is essential for maximizing its potential. Also, having a reliable rangefinder and ballistic calculator app will further leverage the FFP reticle’s capabilities. A good lens cleaning kit is also a must.
Conclusion on Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane
The Nikko Stirling Diamond 6-24x50mm Rifle Scope, 30mm Tube, First Focal Plane offers a compelling package, especially considering its price point. The inclusion of an FFP reticle on a scope in this market segment is a significant advantage, delivering true scalability for aiming at any magnification. It holds zero well, suggesting good internal construction capable of handling recoil.
However, the value proposition is somewhat tempered by the notably stiff adjustment turrets and parallax knob. While the optics are decent, they don’t compete with premium offerings at higher magnifications. Despite these drawbacks, for the shooter who understands and prioritizes the FFP advantage and can work around or perhaps mitigate the stiffness of the turrets, this optic represents a solid choice. I would recommend it, with the caveat that potential buyers should be aware of the control stiffness and the optical limitations at the highest zoom levels.