500 Rounds of 5.56x45 Ammo by Federal - 55gr FMJBT

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4 Review(s)

Ammo Overview

Ammo Quantity - 100 rounds per Value Pack; 5 packs per case
Ammo Manufacturer - Federal
Bullets - 55 grain full metal jacket boat tailed (FMJ-BT)
Ammo Casings - Boxer-primed brass


This 5.56x45mm ammo comes packed in a bulk 500 round case with 5-100 round boxes inside. Loaded at the Lake City Army Ammunition Plant, this ammunition is loaded with full metal jacket boat tail projectiles yielding reliable feeding and appealing aerodynamics as it exits the muzzle at approximately 3165 feet per second. The boat tail design at the base of the bullet improves the ballistic coefficient and due to the huge scale production advantages at Lake City this high quality product is available at a competitive price.

This ammo uses boxer-primed, reloadable brass casings that still show the annealing marks from the production process around the case neck which is the standard for visual inspections required by the US military. This ammo is non-corrosive and will not attract a magnet.

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Our customer service team has published this Q&A information as a free service to the shooting community. Please note that BulkAmmo.com expressly disclaims any and all liability with regard to how the shooting community might use this Q&A information. See Terms of Use for more details.

Posted On: 5/9/2020 By: Seph

A: No sir, there is no steel anywhere in this round or its bullet.

Posted On: 2/12/2020 By: James

A: We do ship to New Jersey! We will have to ask you for an official document before shipping to you, though. You can learn more about that here: luckygunner.com/faq-state-by-state.

Posted On: 10/8/2011 By: Lewis Messer

A: No, this Federal 5.56x45 ammunition is brand new, not reloaded.

Posted On: 9/27/2011 By: Anonymous


There are two things to consider here - the pressure that each caliber is loaded to, and the dimensions of each chamber as specified by SAAMI, which regulates these sort of things. 5.56 ammunition is loaded to higher pressures, and 5.56 chambers are cut to allow this pressure to build up safely. .223 ammunition is loaded to lower pressures, and the chamber dimensions are tighter in comparison to 5.56.

As a result, firing 5.56 ammunition through a .223 chamber can result in pressures that are even higher than what 5.56 would cause in a 5.56 chamber, and much higher than .223 would cause in a .223 chamber. These pressures are unsafe and the .223 weapon is not designed to operate under the forces that result. An immediate catastrophic failure is not likely, but malfunctions and rapid component wear are certain to occur. Neither we nor SAAMI recommend firing 5.56 through a .223 chamber.

Posted On: 9/27/2011 By: Tom Vineyard

A: The difference between 5.56 and 223 Remington is fairly clear. 5.56 mm NATO ammunition is loaded to higher pressures and therefore achieves higher velocities when compared to 223 Remington. A 5.56 mm NATO chamber can fire both types of ammunition, whereas a 223 Remington chamber should only be used to fire 223 Remington ammunition.

Posted On: 9/27/2011 By: Tom Vineyard

A: Both originated in America. External dimensions are identical. The major difference is that 5.56 is loaded to higher pressures than .223. Considering the number of weapons that have been built to cycle 5.56 and/or have not been built to handle pressures higher than that of .223 over the last six decades, and the various needs/purposes of people that buy both types of ammo, combining the two into one would be virtually impossible.

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