The Atomic Ammunition Rifle Match .223 Rem 77gr Tipped MatchKing – 20 Per Box / 10 Per Case – 00459 (UPC: 858767004591) is a true match-grade .223/5.56 load built for shooters who demand sub-MOA accuracy, excellent long-range ballistics, and extremely consistent performance. Loaded with the 77-grain Sierra Tipped MatchKing (TMK) projectile, this round delivers flat trajectory, reduced wind drift, and repeatable shot-to-shot results for competition, precision training, and tactical applications. Classic Firearms+3Saint Barbs Bullets+3Firearms Depot+3
Each case includes 10 boxes of 20 rounds (200 total), giving you enough consistent, same-lot ammo to build and confirm your dope, train seriously, and shoot matches with confidence. Palmetto State Armory+3Firearms Depot+3Buds Gun Shop+3
Key Features – Atomic Rifle Match .223 Rem 77gr Tipped MatchKing (00459)
Match-Grade Construction for Sub-MOA Accuracy
Atomic markets this as match-grade ammunition, built only with premium components and tuned for sub-minute-of-angle performance at both short and long range. Ready Gunner+3Firearms Depot+3Buds Gun Shop+3
What that means on target:
Carefully chosen 77gr TMK bullet for its weight, ballistic coefficient, and aerodynamic profile
Consistent powder charges and new brass cases for tight velocity spreads
Designed to achieve sub-MOA groups in quality rifles when the shooter does their part
Whether you’re shooting paper at 100 yards or ringing steel past 600, this load is engineered to remove ammo as a variable so you can focus on fundamentals and wind calls.
77gr Tipped MatchKing – High BC, Low Drag, Serious Precision
At the heart of this load is the Sierra 77-grain Tipped MatchKing (TMK), a projectile known for its streamlined shape, polymer tip, and excellent ballistic coefficient. Impact Guns+3Saint Barbs Bullets+32Ammunition+3
Advantages of the 77gr TMK:
Polymer tip sharpens the meplat and improves aerodynamics
High BC helps minimize wind drift and maintain velocity at distance
Designed as a match/precision bullet, not a hunting bullet, focusing on accuracy and consistency
This makes the Atomic 00459 load extremely well suited for SPR/DMR-style AR-15s, bolt-action .223 precision rifles, and any platform set up for long-range .223/5.56 work.
2600 FPS & 1155 ft-lbs – Optimized .223 Long-Range Performance
Factory specs list this load at roughly 2600 feet per second with 1155 foot-pounds of energy at the muzzle. 2Ammunition
In practical terms, that gives you:
A flat-shooting trajectory for .223 Rem with a heavy-for-caliber bullet
Enough energy and velocity to stay stable and supersonic well past typical mid-range distances (depending on barrel length and conditions)
A recoil impulse that remains mild and manageable, ideal for fast follow-up shots and extended training sessions
This is the sweet spot for shooters who want serious precision without getting beat up by recoil.
Flash-Suppressed Powder – Cleaner Sight Picture & Better Low-Light Shooting
Atomic uses flash-suppressed powder in this load, which helps reduce the visible muzzle flash—especially important for shorter barrels and low-light environments. Palmetto State Armory+3Firearms Depot+3Buds Gun Shop+3
Benefits:
Less blinding fireball when shooting under artificial light or at dusk
Easier to stay on target between shots, especially through optics
Reduced signature can be beneficial for tactical training and duty-style use
Combined with the 77gr TMK, this makes the 00459 round a great option for Match / Tactical / LE training roles.
New Brass Cases – Reliable Feeding & Reloadable
This .223 Rem Rifle Match load is cased in new brass, not remanufactured, and is Boxer-primed, making it reloadable for shooters who handload. Impact Guns+4Firearms Depot+4Buds Gun Shop+4
Component quality advantages:
Smooth feeding and extraction in semi-auto and bolt-action rifles
Uniform case dimensions for consistent chambering and ignition
Once-fired cases are ideal for precision reloads, especially for shooters who want to fine-tune loads around the 77gr TMK
If you reload, buying this ammo by the case gives you 200 pieces of high-quality brass once you’re done shooting.
20 Rounds Per Box / 10 Boxes Per Case – Built for Real Training & Matches
Atomic’s SKU 00459 is packaged 20 rounds per box and 10 boxes per case, for 200 rounds total. Palmetto State Armory+3Firearms Depot+3Buds Gun Shop+3
That’s an ideal volume for:
PRS/NRL-style gas gun matches or club-level precision matches
Zeroing optics and building DOPE across multiple distances
Serious long-range courses where you want to use the same lot of match ammo all day
Keeping enough on hand to train with the exact round you rely on
Instead of just a couple of boxes for “special occasions,” this case-pack format encourages you to practice with your match ammo, not just store it.
Ideal Uses – Where Atomic 00459 Really Shines
This .223 Rem / 5.56 NATO match load is perfect for: Impact Guns+4Firearms Depot+4Georgia Guns & Ammo+4
Precision AR-15 builds (SPR/Recce/DMR rifles)
Bolt-action .223 precision rifles for long-range steel and paper
Gas-gun matches, tactical/practical competitions, and 2-gun/3-gun stages where accuracy matters
Law enforcement tactical/marksman training where consistent, high-quality ammo is mandatory
While some shooters may use match bullets on varmints or small game, remember that Tipped MatchKing projectiles are primarily designed for accuracy, not controlled terminal performance on larger animals.
Quick Specs – Atomic 00459 Rifle Match .223 Rem 77gr TMK
From major retailers and product listings: Impact Guns+5Firearms Depot+5Buds Gun Shop+5
Brand: Atomic Ammunition
Line: Rifle Match / Match Tactical
Caliber: .223 Remington (compatible with 5.56 NATO chambers)
Bullet Weight: 77 grain
Bullet Type: Sierra Tipped MatchKing (polymer-tipped match bullet)
Muzzle Velocity: ~2600 fps
Muzzle Energy: ~1155 ft-lbs
Powder: Flash-suppressed match powder
Case: New brass, Boxer-primed, reloadable
Rounds Per Box: 20
Boxes Per Case: 10 (200 rounds total)
SKU / MPN: 00459
UPC: 858767004591
SEO-Focused Summary
If you’re searching for Atomic Ammunition Rifle Match 223Rem 77gr Tipped MatchKing 20 Per Box/10 Case 00459 858767004591, this load is a match-grade .223 Rem / 5.56 NATO cartridge built around the 77-grain Sierra Tipped MatchKing, delivering around 2600 fps and 1155 ft-lbs of energy from new brass cases with flash-suppressed powder. Designed for sub-MOA accuracy, long-range consistency, and high reliability, Atomic 00459 is an outstanding choice for precision ARs and bolt rifles, packaged 20 rounds per box and 10 boxes per case (200 rounds) for serious competitors and long-range shooters who want premium performance in true match volume. Impact Guns+5Firearms Depot+5Buds Gun Shop+5
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