Browning X-Bolt Long Action 3rd Rotary Magazine for 7mm Rem Mag/.338 Win Mag/.300 Win Mag - Black Polymer

If you run a Browning X-Bolt in a magnum caliber, you know that reliable feeding and fast follow-up shots matter. The Browning X-Bolt Long Action 3rd Rotary Magazine is a detachable rotary magazine purpose-built for 7mm Rem Mag, .338 Win Mag, and .300 Win Mag. Unlike traditional leaf-spring magazines that feed cartridges at an angle to the bolt path, this rotary design chambers rounds in line with the bolt for a straight, consistent feed into the chamber—exactly what you want when speed and certainty count.

Built from durable lightweight polymer, this magnum magazine holds three cartridges and includes an ergonomic magazine-mounted release for quick changes in the field or at the bench. The rotary mechanism is the result of purpose-built engineering (covered under U.S. patents 8156675, 8484875, and 8745912), and it shows in how cleanly and reliably this magazine feeds even in cold or rough conditions.

Whether you're hunting long-range elk, running drills at distance, or just want a second magazine for your X-Bolt, this is a straightforward upgrade that improves feeding reliability and magazine swaps. If you're already familiar with X-Bolt ergonomics, this magazine slips right in.

Key Features

• Rotary design feeds cartridges in line with bolt path for reliable chamber entry
• Lightweight, durable polymer construction
• Three-round capacity for magnum calibers
• Ergonomic magazine-mounted release lever
• Fits Browning X-Bolt Long Action chambered in 7mm Rem Mag, .338 Win Mag, .300 Win Mag
• Patent-protected rotary mechanism

Specifications

Frequently Asked Questions

What X-Bolt models does this magazine fit?

This is a Long Action rotary magazine designed for Browning X-Bolt rifles chambered in 7mm Rem Mag, .338 Win Mag, and .300 Win Mag. Always verify your rifle's action length and caliber before ordering.

How many rounds does it hold?

This magnum rotary magazine holds three cartridges. Browning also offers magazines with different capacities for standard calibers.

How does rotary feeding differ from traditional magazines?

Instead of stacking cartridges in a leaf-spring design that feeds them at an angle to the bore axis, the rotary mechanism feeds cartridges directly in line with the bolt path. This straighter feed geometry produces more reliable chambering, especially with larger magnum rounds.

What's included?

You receive the detachable rotary magazine. Magazine-fed X-Bolt rifles come with at least one factory magazine; this is an additional or replacement magazine.