223 Remington 77gr TMK

223 Rem Subsonic 77gr Tipped Matchking

Brass Casings

Tighter dimensional tolerances guarantee a properly seated bullet and ensure successful firing each time the trigger is pulled. By maintaining military/match specs, we provide the shooter with a precision product touting exceptional consistency. A product that thrives in an environment where it’s the first shot that counts.
Ammonia Vapor testing:
Confirms quality and consistency of the final product, resistance to corrosion, and a long life.
Vickers hardness testing:
Exact locations on the casing base, neck, and head are tested for hardness, ensuring durable and reliable performance.
Smaller manufacturing runs:
Provides greater attention to detail and tighter quality standards compared to larger manufacturers.
Process control:
Our processes have been studied statistically and are monitored to ensure the highest consistency casings are manufactured and delivered. All of our technicians are trained in SPC and follow established procedures based on decades of automotive deep draw experience.
Military/match spec:
Dimensions are held to a tighter standard so that the final product performs exceptionally every time.
Automated dimensional inspection:
Precise measurements of the dimensional aspects of each casing ensure vital performance characteristics are achieved. Concentricity, wall thickness, hardness, and uniformity are guaranteed from part to part and lot to lot.
Cartridge customization:
Each cartridge design can be dimensionally customized for use with specific weapons and projectiles.
CIP Specifications
Type: Rifle
Date of Origin: 1962
Case Type: Rimless, Bottleneck
Neck Diameter: .253 in (6.4 mm)
Shoulder Diameter: .354 in (9.0 mm)
Base Diameter: .376 in (9.6 mm)
Rim Diameter: .378 in (9.6 mm)
Base Thickness: .045 in (1.1 mm)
Case Length: 1.76 in (45.0 mm)
Primer Type: Small Rifle
Max Pressure: 55,000 psi (380 MPa)

Sierra 77gr Tipped MatchKing
Let’s face it – sometimes subsonic is the only way to go. If you want a personal protection round, or if you’re in law enforcement, our subsonic range has everything you could ever possibly want.
Because power is great ….
And that’s where our Subsonic ammunition comes in.
This slightly heavier bullet really may be the ultimate competition round for your .223.
Sierra has enhanced a segment of the MatchKing line by adding the acetal resin tip. The major advantage of adding a tip to the bullet is the reduction of drag, producing a more favorable ballistic coefficient.
Near-Perfect Ballistics From Sierra now in a subsonic.

And again, we’ve coupled that best in class projectile with an excellent quality casing.

Hodgdon Powder
And to make it even more reliable, and help keep your weapon even cleaner, we use Hodgdon powder. We believe Hodgdon is the best powder in the world because of its even and clean burn characteristics. This creates even more accuracy, outperforming what anybody could reasonably expect from such affordable ammo.

223 Rem

77 Grain TMK

Omega 20 Count