Sierra 9377MP MatchKing 22Cal 77gr Hollow Point Boat Tail 250/Box

The Sierra 9377MP MatchKing 22 caliber 77-grain hollow point boat tail bullet is purpose-built for precision rifle competition and target shooting, particularly for AR-15 and M16 platforms. These jacketed lead bullets have earned their reputation by delivering the consistency and accuracy needed to set national records in service rifle matches. The 77-grain weight and design allow these rounds to seat to an overall length compatible with standard magazine feeds, making them practical for high-volume match scenarios where reliability matters as much as precision.

What sets MatchKing bullets apart is their engineering for match-grade accuracy. The hollow point boat tail profile minimizes aerodynamic drag and promotes ballistic stability downrange, helping shooters achieve the tight groupings demanded by competitive shooting. With a G1 ballistic coefficient of 0.372 and G7 BC of 0.182, these bullets maintain velocity and energy over distance in a way that supports the precision shooting discipline demands. The boat tail design also reduces jump variability from the magazine to the chamber—a critical factor when every fraction of an inch counts in competition.

Sierra packages these bullets 250 per box, giving reloaders a practical quantity for developing loads, testing, and running match practice. If you're loading for an AR-platform rifle in 22 caliber and you prioritize accuracy and consistency over hunting performance, the 9377MP is a solid choice for the range.

Key Features

• Hollow point boat tail design for optimized ballistic performance and accuracy
• 77-grain weight engineered for AR-15/M16 magazine compatibility
• Jacketed lead construction for reliable feeding and consistent performance
• Record-setting accuracy in service rifle competition
• 250 rounds per box for practice and load development

Specifications

Frequently Asked Questions

Will these bullets work in my AR-15 magazines?

Yes. The 77-grain MatchKing is designed to seat to an overall length that allows cartridges to load reliably into standard M16/AR-15 magazines, making them practical for competitive and training scenarios where magazine compatibility is essential.

Are Sierra MatchKing bullets suitable for hunting?

MatchKing bullets are not recommended for most hunting applications. They are engineered specifically for target and match shooting, where precision and consistency are the priority. If you're looking for hunting ammunition, Sierra offers other bullet designs better suited to that purpose.

What's the ballistic coefficient, and why does it matter?

This bullet has a G1 BC of 0.372 and G7 BC of 0.182. Ballistic coefficient measures how efficiently a bullet maintains velocity in flight. A higher BC means less wind drift and velocity loss at distance—important for competitive shooting where tight groupings downrange separate winners from the rest of the field.

What does the boat tail design do?

The boat tail profile reduces aerodynamic drag and improves ballistic stability, helping the bullet fly more consistently and predictably downrange. This design also reduces jump variability when feeding from the magazine, which contributes to the accuracy MatchKing bullets are known for in competition.