Vector Optics ViperRay .300 Win. Mag. Cartridge Red Laser Bore Sight (SCBCR-08) — Fast, ammo-saving pre-zero for .300 Winchester Magnum rifles

The Vector Optics ViperRay .300 Win. Mag. Cartridge Red Laser Bore Sight is a caliber-specific collimator that mirrors the geometry of a real .300 Winchester Magnum cartridge. Its concentric brass body projects a 650 nm red Class IIIA (<5 mW) laser precisely along the bore axis so you can align a scope, prism, or red-dot optic at home or on the bench. Arrive at the range already “on paper,” save premium hunting ammunition, and finish with a fine live-fire zero tailored to your load and distance.

Engineered for repeatability, the ViperRay is factory pre-centered and powered by common button cells, making it a compact tool to keep in your range kit. Use it after mounting new rings, swapping optics between rifles, or checking zero post-transport—especially useful with hard-recoiling .300 WM setups where confidence matters.

Key Parameters

• Caliber: .300 Winchester Magnum (cartridge-form chamber insert)
• Laser: Class IIIA, <5 mW output
• Wavelength: 650 nm (red)
• Body Material: Brass, durable finish
• Length: 66 mm (2.6″)
• Weight (net): 47 g (1.6 oz)
• Power: 3 × AG13 / LR44 button cells (batteries not included)
• Model / SKU: SCBCR-08 (ViperRay series)

Real-World Use Cases

Hunting rifles: new optics and seasonal checks

Rough-in a fresh scope or verify alignment after travel before your final 100 m zero. The bore-axis laser gets you close in minutes so you burn fewer high-BC .30-cal bullets confirming POI.

Precision & practical long-range

After changing bases, rings, or torque, use the ViperRay to re-index your reticle to a fixed target indoors. You’ll start live-fire development already aligned to the bore, saving time on tall-target and tracking tests.

Guide & range workflows

Keep a reliable reference tool on hand for client rifles. A quick chambered check confirms mounts survived transit and handling before you send shooters to the line.

Mechanical & Build Highlights

• Cartridge-accurate brass body: Seats concentrically in .300 WM chambers for repeatable alignment.
• Pre-centered emitter: Factory alignment provides a consistent reference point out of the box.
• Bright 650 nm dot: Clean, visible aiming point for coarse alignment under typical indoor lighting.
• Compact & durable: Pocket-size unit stands up to frequent chambering during setup and maintenance cycles.

What’s in the Box

• ViperRay .300 Win. Mag. cartridge red laser bore sight (SCBCR-08)
• User instructions
• Batteries not included (requires 3 × AG13 / LR44)

Compatibility & Setup Notes

• Chambering: For .300 Winchester Magnum only. Do not use in .300 WSM, .300 Weatherby, .300 PRC, .30-06, or other .30-caliber variants.
• Safety first: Verify the rifle is unloaded and the chamber is clear; keep the muzzle pointed in a safe direction.
• Initial alignment: Aim the laser at a small indoor reference mark (e.g., 10–15 m). Adjust your optic so the reticle overlays the dot.
• Finalize at the range: The laser travels in a straight line while bullets follow a trajectory. Always confirm and refine your zero with live ammo at your chosen distance (e.g., 100 m), accounting for ammo and environmental factors.
• Battery care: Insert three AG13/LR44 cells with correct polarity; remove between uses to prevent drain.

Technical Specifications

Summary

The ViperRay SCBCR-08 is a simple, durable way to pre-align optics on .300 Win. Mag. rifles. With its cartridge-accurate brass body, pre-centered 650 nm Class IIIA laser, and compact form factor, it gets you close fast—so you can confirm with a handful of rounds and head into the field confident in your zero.