Blackout Ammunition .223 REM 55gr Sierra Blitzking©, 150 Round Bucket

Blackout Ammunition .223 REM 55gr Sierra Blitzking©, 150 Round Bucket, in stock and shipping now. If you already know .223 Remington, skip to the specifications; if not, the buying notes below are the useful part.

Specifications

Cartridge	.223 Remington
Bullet weight	55 grain
Projectile	Polymer Tipped Varmint
Bullet diameter	.224
Typical muzzle velocity	2,700 to 3,240 fps depending on bullet weight and barrel
Usual twist rate	1:7 to 1:9
Platform	AR-15
Rounds per pack	150
SKU	GA22355SBKB
Price	$125.99
Cost per round	$0.840

Also in .223 / 5.56: Blackout Ammunition .223 Rem 77gr Sierra MatchKing©, 20 Round Box, Blackout Ammunition .223 REM 55gr Sierra Blitzking©, 20 Round Box and Blackout Ammunition .223 REM 69gr Sierra Matchking©, 20 Round Box.

What this polymer tipped varmint bullet is built to do

This is a built for violent, rapid expansion on light game, with a polymer tip that raises ballistic coefficient and starts expansion immediately. Not a deep penetrator, and not intended to be.

Construction decides terminal behaviour far more than weight does. Two loads of the same grain weight with different jackets do completely different things at the target.

Working with .223 REM

Light-for-calibre bullets rely on velocity rather than mass, so barrel length matters more here than in most cartridges.

Muzzle velocity for .223 Remington typically runs 2,700 to 3,240 fps depending on bullet weight and barrel, from a AR-15 platform with a 1:7 to 1:9 twist. Barrel length, lot and temperature all move that figure, so verify it in your own rifle rather than relying on the box.

Choosing this bullet weight

At 55 grain this is on the lighter side for .223 Remington. Lighter bullets leave the muzzle faster and shoot flatter, which helps on smaller targets and at distance, but they bleed velocity sooner and depend more on impact speed to do their job.

Cost per round

150 rounds at $125.99 works out at $0.840 per round. Bulk packaging like this is how you keep a rifle you shoot regularly fed without the per round cost climbing.

Before you order

Shipping rules for ammunition vary by state and sometimes by city. Some destinations require a licence, an approved recipient, or refuse delivery entirely. Check before you order rather than after. See our shipping and delivery page for the current detail.

Barrel length and velocity

Do not assume box velocity applies to your barrel. Published figures usually come from long test barrels, and real rifles run slower. For .223 Remington specifically, expect 2,700 to 3,240 fps depending on bullet weight and barrel as the published band and treat your own chronograph as the authority.

Browse more

Browse .223 and 5.56 ammunition for other weights and projectile types, or run your setup through the ballistics calculator.

Where .223 Remington sits

Against 5.56 NATO it is the lower pressure sibling, and against 6mm ARC or 6.5 Grendel it gives up downrange energy in exchange for cheaper ammunition and far wider availability.

None of that makes one cartridge better in the abstract. It makes them better at different jobs, and the job is yours to define.

Stock and handling

This is genuine factory ammunition, held in a climate stable stockroom rather than a container. Orders are picked from sealed cases and packed so nothing shifts in transit.

If this is your first purchase in this calibre, buy one box before you buy ten. Rifles are individual, and a load that groups beautifully in one barrel can string in another for no obvious reason.

Frequently asked questions

What platform suits .223 Remington?

A AR-15 with a 1:7 to 1:9 twist is the usual setup. Light-for-calibre bullets rely on velocity rather than mass, so barrel length matters more here than in most cartridges.

Is the published .223 Remington velocity accurate?

It is indicative. Expect 2,700 to 3,240 fps depending on bullet weight and barrel as a range, and verify with a chronograph.

Is the polymer tipped varmint projectile suitable for what I am shooting?

It is a built for violent, rapid expansion on light game, with a polymer tip that raises ballistic coefficient and starts expansion immediately. Not a deep penetrator, and not intended to be. Match that against your intended use before buying.

Why choose 55 grain?

Weight sets the trade between velocity and momentum. 55 grain is one point on that curve; the right pick depends on your barrel, your distance and your target rather than on the number itself.

What is in the pack?

150 rounds at $125.99, which is $0.840 per round.