Remington .223 Rem 55 Grain Full Metal Jacket – 20 Rounds (Box) L223R3B

Remington .223 Rem 55 grain full metal jacket, model L223R3B, twenty rounds to a box, is about as familiar as American rifle ammunition gets. It has been feeding varmint rifles and carbines for generations, and it still does the job without any fuss.

Sometimes you do not need a specialty load. You need ammunition that goes bang, feeds cleanly and lands where you aimed, and that is exactly what this is.

What Remington .223 Rem 55 grain FMJ is for

Remington .223 Rem in this form is a practice and general purpose load built around the 55 grain full metal jacket bullet, the projectile the .223 cartridge was originally designed around. Nothing about it is exotic, and that is precisely its strength.

The full metal jacket construction keeps the bullet intact through the target. It punches clean, scoreable holes in paper, it is safe on properly rated steel, and it satisfies the range rules that prohibit expanding or steel core ammunition.

It is for the new rifle owner learning fundamentals, the shooter confirming a zero before a hunt, the range regular putting in weekly reps, and anyone who wants a couple of boxes in the truck for whatever the day brings.

Features that keep people buying it

• 55 grain full metal jacket bullet, the universal .223 weight that every barrel twist rate stabilises.
• Twenty round boxes, a sensible unit for zeroing, a drill block or a day in the field.
• Smooth bullet profile that feeds reliably from AR pattern magazines and bolt gun feed ramps.
• Loaded to the same specification box after box, which keeps your point of impact where you left it.
• Burns clean enough that a long session does not turn into a scrubbing marathon afterwards.

Specifications and their practical meaning

Remington .223 Rem ships twenty rounds per box, with a 55 grain full metal jacket bullet under manufacturer model L223R3B. Short list, and every entry on it matters.

The 55 grain weight is the reference standard for this cartridge, which is why it shoots acceptably in essentially every rifle chambered for it. Slow 1:12 twist varmint barrels, mid 1:9 barrels and fast 1:7 carbines all stabilise it without complaint, so one box works across a mixed collection.

Twenty round packaging suits the way most people actually shoot. Five boxes is a hundred rounds, which covers a typical zeroing and drill session, and you are not committing to a case to try a load in a new rifle.

Having the model number L223R3B on the box matters more than it looks. When a load shoots well in your rifle, that number is how you buy the identical thing again instead of guessing from a shelf tag.

Range use, storage and compatibility

Every rifle chambered in .223 Remington will run this ammunition, and 5.56x45mm NATO chambers accept it safely as well since the NATO chamber has the longer throat. Going the other way is where problems start, so keep your cans labelled.

Store the boxes cool, dry and out of direct sunlight. Centerfire ammunition kept that way stays completely serviceable for decades, while heat cycling in a garage or a vehicle trunk will age primers and powder far faster than time alone.

Clean the rifle normally afterwards, with attention to the chamber and bolt face when you have run several hundred rounds in a day. If you want to move up to case quantities and cut your cost per round, browse our ammunition category for the bulk options.

Remington has been making cartridges in America since 1816, and there is a good reason this particular load has stayed in the catalogue as long as it has.

Keep a few boxes of Remington .223 Rem on the shelf and your rifle is never short of something to eat. This ammunition ships straight to your door wherever state and local law allows.