223 (5.56) Ammo

.223 Remington ammunition and 5.56x45 NATO are closely related and sometimes interchangeable cartridges depending on the firearm they are to be used with. Manufacturers typically offer guidance on this point. In general, the 5.56 NATO ammunition the military uses and is for sale to the civilian market operates at higher pressures than .223 Remington ammo. Most, but not all, AR-15s are chambered for 5.56 NATO and can fire both types of ammo.

Many loads in both calibers follow the M193 or M855 standard, both of which are military specifications. M193 ammo typically fires a 55 grain full metal jacket bullet at 3,240 feet per second, while M855 ammo fires a heavier 62 grain FMJ bullet at about 3,100 feet per second. These common standards are very helpful when sighting in your optics and you'll find both cartridges in-stock and available in cheap bulk packs here at Widener's

Certain specialized loads deviate from these common standards. Competition grade .223/5.56 ammo fires a heavier bullet (most commonly a Sierra MatchKing) in the 77 grain range to provide better stability and more predictable trajectories; varmint loads, on the other hand, fire light 30-40 grain bullets at very high velocities to produce lethal fragmentation against pest animals.

One of the most sought after range loads for this caliber is Lake City ammunition, which is produced by Federal Premium Ammunition at the Lake City Army Ammunition Plant in Independence, Missouri. LCAAP production is typically excess from government contracts and is popular due to its military origins and high quality.

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  1. Speer Lawman RHT 223 Rem 55 Grain Frangible – 20 Rounds


    In stock

    Manufacturer Speer
    Condition New
    Bullet Weight 55 Grain
    Bullet Type Frangible
    Use Type indoor range shooting, plinking at the range, steel target plinking
    Casing Type Brass
    Quantity 20
    Ammo Caliber 223 Remington
    Manufacturer SKU 24603
    Primer Type Boxer
    Magnetic No
    UPC Barcode 076683246035
    Cost Per Round $1.25 per round

    Shooting indoors presents certain hazards. There’s the risk your bullet could decide to ricochet upon hitting a concrete wall, or pepper you with violent splash-back if it connects with a nearby steel target. Worse yet, indoor ranges trap in lead vapor which your lungs would gladly rather avoid. As Frasier once sang: “What is a boy to do?”

    What you should do is order Speer’s Lawman RHT ammo. This 223 Rem cartridge features SinterFire’s 55 grain frangible bullet, which is made entirely out of compressed copper and tin powders. When it connects with something hard and resilient like a rock or thick steel plate it erupts harmlessly, virtually eliminating vicious splash-back. And without any lead this bullet produces no aerosolized nastiness for you to breathe following ignition or impact!

    This round reliably mimics the ballistic performance of an analogous self-defense load with its muzzle velocity of 3,100 fps out of a 24” barrel. It achieves this with clean burning propellant and CCI’s own Clean-Fire primer, which like its bullet contains no heavy metals. This round’s brass case is its only conventional component, so you can certainly reload it with any bullet you please.

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