SME Sight-Rite Laser Bore Sighting System 300 Win Mag Brass Casing

The SME Sight-Rite Laser Bore Sighting System is a chamber-style 300 Win Mag bore sighter built to take the frustration out of mounting and zeroing a scope or red dot on a magnum-chambered rifle. Drop the sighter into the chamber like a live cartridge, close the bolt, and the high-output laser projects a beam straight down the bore so you can dial in your optic's windage and elevation without burning a single round at the range.

This caliber-specific XSIBL300WIN unit is precision machined from brass to the exact dimensions of a standard 300 Win Mag case, giving concentric alignment with the bore and a true indication of where the barrel points. The cartridge-style body seats directly in the chamber and is retained by the bolt face, making setup fast and repeatable on any rifle chambered for the .300 Winchester Magnum family of cartridges.

The sighter is powered by a high-output laser activated by the included alkaline button cell batteries, providing plenty of visible beam for sighting-in on the bench or in a well-lit indoor range. Three button cell batteries ship with the unit so it is ready to use right out of the package, and replacement batteries are inexpensive and widely available.

Whether you are mounting a new scope, confirming zero after a long trip, or aligning a red dot, the SME Sight-Rite 300 Win Mag chamber-style bore sighter is a fast, ammo-saving tool for any serious rifle shooter.