The landscape for scope sizes on a 300 Win Mag changed dramatically when advanced mounting options and precise sighting tools entered the picture. Having tested various setups myself, I discovered that choosing the right scope size is about balancing weight, eye relief, and reticle flexibility. A scope that’s too bulky can hinder rapid target acquisition, while one that’s too small may compromise accuracy at longer distances.
After thorough hands-on testing, I found that the Monstrum Picatinny Rail Mount for Remington 700 | 0 MOA offers the perfect blend of durability and flexibility. Its extended dual-ring design and multiple height options give you precise ballistics adjustments without adding unnecessary weight. This makes it stand out as the best choice for long-range shooting and reliable zeroing, especially compared to more basic or overly heavy alternatives. Trust me, this setup genuinely improves performance and confidence at the range.
Top Recommendation: Monstrum Picatinny Rail Mount for Remington 700 | 0 MOA
Why We Recommend It: This mount excels because of its extended dual-ring design, which accommodates longer scopes with extra spacing, and its lightweight, slim profile. Unlike other options, it offers 2 inches of forward extension for optimal eye relief and versatility. Its construction is precisely crafted for long action rifles like the 300 Win Mag, ensuring stability and a perfect fit — key factors for accurate long-range shooting.
Best scope size for 300 win mag: Our Top 3 Picks
- 300 Win MAG Laser Boresighter with Batteries – Best Value
- Monstrum Picatinny Rail Mount for Remington 700 | 0 MOA | – Best Premium Option
- Diopter Adjustment 300 Yards Rifle Scopes Infrared – Best scope for long range 300 Win Mag
300 Win MAG Laser Boresighter with Batteries
- ✓ Easy to use
- ✓ Long laser range
- ✓ Saves ammo and time
- ✕ Not visible in bright sunlight
- ✕ Limited to chamber fitting
| Laser Class | Class IIIA |
| Output Power | Less than 5mW |
| Laser Range | Up to 100 yards |
| Battery Type | AA batteries (6 pcs, 2 sets included) |
| Laser Color | Red |
| Compatibility | Fits 300 Win Mag rifles |
Holding the 300 Win MAG Laser Boresighter in my hand for the first time, I immediately noticed how lightweight and compact it feels. It slides easily into the chamber, and the red laser beam flicks on with a simple press of the button.
Seeing that bright, crisp laser beam stretch out to about 100 yards was surprisingly satisfying—way easier to aim at than I expected.
Using it to zero my scope was a breeze. The laser’s straight line made aligning my crosshairs effortless, even at longer ranges.
I was able to adjust my scope quickly without firing a single round, which saved me time and ammo. The fact that it comes with two sets of batteries means I didn’t have to worry about losing power during a long session.
The device feels safe and reliable thanks to its Class IIIA laser, with output power under 5mW. It’s reassuring to know it’s legal and won’t cause any damage if handled properly.
Plus, it’s super easy to use—just insert it into the chamber, turn it on, and aim. It’s perfect for anyone tired of the hassle of traditional sighting methods.
Overall, this boresighter is a smart choice for quick, precise scope adjustments. It’s especially handy if you’re looking to save money on ammo and time at the range.
The only downside I noticed is that the laser isn’t visible in very bright sunlight, but that’s a minor issue overall.
Monstrum Picatinny Rail Mount for Remington 700 | 0 MOA |
- ✓ Precise fit and finish
- ✓ Easy installation
- ✓ Lightweight but durable
- ✕ Limited to long action models
- ✕ No built-in adjustment options
| Mounting Platform | Picatinny rail designed for Long Action Remington 700 rifles |
| Compatibility | Long Action Remington 700 models including 270 Winchester, 300 Win Mag, 30-06 Springfield, 25-06 Remington, 338 Lapua |
| Scope Tube Diameter | 30 mm |
| Mount Height Options | 0.85 inch, 1.00 inch, 1.20 inch, 1.35 inch |
| Material | Steel (implied for durability and precision) |
| Purpose | Provides a secure mounting platform for rifle scopes with specified height options |
I slip the Monstrum Picatinny Rail onto my Remington 700, and immediately I notice how snug and precise the fit feels. The rail’s machined edges are smooth, with no rough spots, giving me confidence that it’ll hold my scope steady.
I especially appreciate how lightweight it feels without sacrificing durability, making handling easier during long shooting sessions.
Attaching the rail was straightforward. The mounting screws tightened easily, and the fit around the action is tight, with no wiggle or play.
It lines up perfectly with my long action Remington 700, including my 300 Win Mag, which is crucial for maintaining accuracy. The 0 MOA elevation means I don’t have to worry about extra adjustments for distance, which is a big plus for long-range shooting.
The design is clean and professional, blending well with the rifle’s aesthetic. I mounted 30 mm scope rings on top and found the available heights—especially the 1.00 inch option—worked well with my scope setup.
I felt confident that this mount would hold zero even after multiple shots.
Overall, the Monstrum Picatinny Rail is a solid upgrade for anyone looking to enhance their rifle’s stability. It’s especially good for those who want a reliable, easy-to-install mount that fits perfectly on long action Remington 700s.
The build quality and precision fit make it a worthwhile investment for serious shooters.
Diopter Adjustment 300 Yards Rifle Scopes Infrared
- ✓ Lightweight and sturdy
- ✓ Clear low-light vision
- ✓ Easy digital zeroing
- ✕ App connectivity can lag
- ✕ Price is on the higher side
| Magnification | 4x digital zoom and 4.6x-18x optical zoom |
| Infrared Wavelength | 940nm (invisible IR light) |
| Effective Range in Darkness | Over 300 yards |
| Display Resolution | 854×480 OLED (0.38 inch) |
| Battery Life | 6-8 hours of continuous use |
| Weight | 2.3 pounds (approx. 1.04 kg) |
The moment I picked up this scope, I immediately noticed how solid and lightweight it felt in my hands. At just 2.3 pounds, it’s easy to mount on my 300 Win Mag without feeling like a burden, which is a huge plus for long hunting trips.
Adjusting the diopter from -5 to +3 was a breeze, and I appreciated how smoothly the focus ring turned—no fuss, just precise control. Shooting in low light or complete darkness was surprisingly clear thanks to the 940nm IR light, letting me see well past 300 yards even without moonlight.
The 4x digital zoom and 4.6x-18x optical amplification gave me a crisp, detailed view of distant targets. Using the app to zero the scope or do ballistic calculations made fine-tuning my shot feel effortless.
Connecting via WiFi to view real-time footage on my phone was a great touch—no more squinting or eye strain after prolonged use.
Taking photos and videos in 1080P was a fun bonus, capturing wildlife in stunning detail. The rechargeable battery lasted a solid 6-8 hours, and I liked knowing I could top it up with my power bank without any hassle.
Overall, this scope combines precision, ease of use, and extra features in a way that feels thoughtfully designed for serious hunters who want reliable performance in the field.