If you're running a Ruger 77 chambered in .357 Magnum, you know that reliable ammunition feeding is non-negotiable in the field or at the range. The Ruger 90345 77/357 Magazine is a factory-original 5-round rotary magazine designed specifically for this rifle platform. Built to Ruger's exacting standards, this magazine pairs a polymer body with steel feed lips—the combination that's proven itself across thousands of hours of hunting and shooting.

Rotary magazine designs are prized by .357 Magnum shooters for their smooth feeding characteristics and compact footprint. The polymer construction keeps weight down while the steel feed lips ensure consistent chambering, shot after shot. Whether you're working up loads at the bench or pursuing game in rough country, a quality factory magazine is the foundation of reliable rifle performance.

Ruger magazines are manufactured to the same tolerances as the rifles they're made for. That precision matters—loose tolerances lead to feeding hiccups and frustration. This is the magazine Ruger engineers specified for the 77/357, and it's the magazine serious shooters choose for a reason.

Key Features

• Factory Ruger design optimized for 77/357 rifles
• 5-round capacity in a compact rotary configuration
• Polymer body for durability and light weight
• Steel feed lips for reliable feeding and long service life
• Black finish for low visibility and corrosion resistance

Specifications

Frequently Asked Questions

Will this magazine work with all Ruger 77 rifles in .357 Magnum?

This is a factory magazine designed specifically for Ruger 77 rifles chambered in .357 Magnum. It is made to the exact specifications of that platform.

What's the difference between a rotary magazine and a standard box magazine?

Rotary magazines use a rotating follower to present rounds to the chamber. They're compact, reliable, and feed smoothly with most bullet profiles. They're especially popular in .357 Magnum rifles where round shape varies.

Can I use this magazine in other calibers or rifle models?

This magazine is engineered for the Ruger 77 in .357 Magnum only. Always use the factory magazine specified for your rifle and caliber.

How do I maintain and clean the magazine?

We don't have cleaning or maintenance details for this item. If you have specific care questions, contact Ruger's customer service directly.