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The .223 Remington is one of the most widely used centerfire cartridges today. Tracing its roots back to the .222 Remington, the .223 was designed to achieve certain ballistics for military use. The .223 Remington, when in its military form, is known as the 5.56x45mm NATO. The differences between the two being the pressures that they are loaded at and the chamber in the firearm itself.

The .223 has established itself as an excellent varmint and target caliber. It dominates all other rifle calibers in competitions such as 3-gun, and has a dedicated following in several other sports due to its low recoil and accuracy potential. Those two attributes coupled with good velocity allow it to excel as a varmint gun also.

When loaded at .223 Remington pressures, our brass is safe to use in any firearm chambered for .223 or 5.56x45mm. If loaded to 5.56 pressures, you need to use firearms labeled for use with 5.56mm. It can be unsafe to fire 5.56mm ammunition in firearms with a .223 Remington chamber.

If out of stock check out our 5.56x45mm case.

**WARNING** In firearms that use a floating firing pin (such as the AR-15 and its variants), dropping the bolt on a chambered round could lead to a slam fire. It is important that these firearms are loaded from the magazine so that the bolt loses inertia when it strips a round from the magazine. It is also important NOT to use sensitive primers that aren’t designed for use in an AR, as this increases the chance of a slam fire.

  250 for $73.00

  500 for $133.00

  1000 for $242.50

Limit Quantity 2 per household
* Starline Brass does not sell any loaded ammunition. What you are purchasing are brass cases only and will need to be loaded into ammunition in order to be fired from a firearm.

Average rating

4.9 / 5

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Rating breakdown


J Das
Horsham, PA
December 30, 2021
Product Review
Starline 223 Good stuff They hold up well and primer pockets are good . No Problems at all with them at all I will getting more when they are available.

Daniel O'Connor
Douglas, WY
June 23, 2020
Product Review
Great quality in 1100 pieces only 1 neck slightly short and two dented necks , compared to the others that's incredible. All primer pockets were perfect no need to ream . Would I buy again? INDEED I WILL!!!

Kyle Burley
Killeen, TX
April 30, 2020
Product Review
Fantastic brass. I've used it for load dev and high power matches with a variety of bullet weights and loads with great succcess. There is significant by case weight to this brass over Federal and Lake City. Highly recommended.

David James
River Heights, Utah
March 27, 2019
Product Review
Love my Starline .223 brass.

Angus Nutt
Buffalo, New York
March 29, 2018
Product Review
Very nice. I like the fact that it comes with lubricant/ preservative sprayed on at the factory. Makes the first full length sizing fast and easy and helps shine everything up in my tumbler. I will never buy anything else. Wished I lived near by, I would love to see the plant in operation.

Tim Glascock
Carmi, Illinois
January 30, 2018
Product Review
Starline Brass is a great product I have bought several bags and have had great result with it holds up great no problem s with it yet there pistol Brass is also a plus will continue useing it

Ray B.
Stony Point, New York
November 28, 2017
Product Review
Excellent Brass as expected... Starline is top notch all around... I'm HOPING to see 22 Hornet and maybe 25-20 added to the lineup ???? hint hint!!!? Thanks Starline for adding more calibers and making an Excellent product!!!