200 rounds of Federal
XM556SBCT3 5.56 NATO 62 gr Tactical Bonded Softpoint Cartridges
200 rounds of Federal XM556SBCT3 62 grain Tactical Bonded Softpoint
cartridges in caliber 5.56 NATO. Packaged 20 Rounds per carton. Made in
USA by Lake City Ammunition Plant.
XM556SBCT3 utilizes the same T3 bullet as XM556FBIT3 with a propellant developed specifically for optimal performance for the 11.5" short barreled rifles used by the FBI HRT teams.
It comes fresh to us from the manufacturer through an intermediary. This
is the real deal. Unlike some examples of XM556FBIT3M, it is not
labeled as a "second" by the manufacturer because it failed the FBI's
accuracy requirements. Nor is it the "reclassified" ammunition
which appears to be contract seconds/rejects for XM56SBCT3.
The round is known for its reliability, and ability to defeat tough
barriers with minimal deviation while maintaining accuracy and terminal
"The FBI has completed their testing process and awarded a 5.56 mm
ammunition contract for up to $97 million dollars. This award is now
public information and appears unique in several ways. Besides being
perhaps the largest ammunition contract in FBI history, it is also the
first time the FBI has mandated a true 5.56 mm pressure loading, rather
than the typical anemic .223 pressure loadings that have generally been
marketed to LE agencies. The 5.56 mm load offers approximately an extra
200 fps--helping performance out of short barrel weapons and enhancing
function when rifles are dirty or in dusty conditions. The new FBI
contract also required that the ammunition be packaged on stripper
clips to aid in more rapid loading of magazines. Finally, it is the
first multi-award carbine ammo contract for the FBI--both Federal
Cartridge and Winchester were judged to offer ammunition which met the
contract criteria. Numerous other Federal LE agencies are authorized to
purchase off this contract.
The 5.56 mm Federal 62 gr
Trophy Bonded Bear Claw (TBBC) bonded JSP load is XM556FBIT3.
The 5.56 mm Winchester 64 gr solid base bonded JSP is Q3313 on stripper
clips/RA556B in 20 rd boxes.
Both of these loads are the best barrier blind 5.56 mm loads ever
produced for LE use; they offer outstanding terminal performance, even
after first defeating intermediate barriers like vehicle windshields."
Many rifles chambered in 5.56 NATO are not realizing their full
potential when shooting 223 Rem ammo. To get all the performance 5.56
NATO can deliver, you need a 5.56 NATO load. 5.56 NATO chambered rifles
were designed to take advantage of the higher pressure of the 5.56 NATO
cartridge — higher pressure translates to increased velocity,
higher energy and harder-hitting performance. CAUTION: Firing 5.56 NATO
ammunition in 223 Remington chambers will produce a dramatic rise in
pressure which increases stress on the weapon, risking wear, permanent
damage and/or injury.
NOT for use in 223 REM chambered guns!
is essentially the law enforcement .223 version of this round. If your
chamber is .223 rather than 5.56, this is for you. The LE223T3 gets
more QA/QC, clear primer sealant vs. blue, and nickel plated rather
than brass cases.
"5.56 mm Federal 62 grain
Bonded Softpoint FBI Equivalent Load XM556SBCT3, per the manufacturer
and our sources this is the same ammo XM556FBIT3 that we had in the
past, they just give it a different SKU # for non-FBI contract. This
ammo is one of the most advanced designs for personal protection or law
enforcement use where maximum knock down power is desired. This is the
real deal and is not labeled as a "second" by the manufacturer."
quoted on Slickguns
More information regarding the differences in these cartridges recently
"Standard first run, USG contract 5.56 mm 62 gr bonded JSP ammo for the
FBI and other Fed LE agencies is XM556FBIT3--so much for "x" meaning
appears to be the .223 version of XM556FBIT3. ""The 2015 solicitation I
linked before notes that "Current FBI service ammunition is Federal
Cartridge, 62 grain Tactical Bonded, product number XM556FBIT3M""
"Federal says its not reloads or rejects but that it is the same exact
bullet/load as the fbi contract."
Some XM556FBIT3 was sold in
cartons marked "Factory Seconds" in 2016. These cartridges were said to
have failed to meet the FBI's accuracy requirements, and some of these
cartridges purchased on the civilian market appeared to have quality
appears to be a different solicitation of XM556FBIT3 that is intended
for short barrel carbines. "The SBC loads were intended for FBI HRT
teams, who were using primarily 11.5” SBRs. The load was
optimized more to reduce flash, possibly some other changes in the
powder." (Eagle Eye Guns first carried this cartridge in the summer of
2013, though some may have leaked out 1 1/2 years earlier).
appears to be the .223 version of XM556SBCT3. "... a reliable source
said that the current FBI contract round was .223 pressure XM223
did note that they switched to the .223 load because it was more
- RXM556T3 appears to be XM556SBCT3 that was reclassified as seconds or rejects. First available December 2011.
"The new Federal 5.56 mm
62 gr TBBC bonded JSP (XM556FBIT3)
as well as the older .223 55 & 62 gr TBBC bonded JSP's (
the new 5.56 mm Win 64 gr bonded JSP (Q3313/
and the new 5.56 mm
50 gr TSX
are the BEST general
purpose loads available for LE use today."
Dr. Gary Roberts
(Regarding Duty ammunition for Colt M4A1 with 11.5" barrel) "Your best
bet is a 5.56 mm (not .223) loading of a barrier blind projectile.
5.56 mm Federal 62 gr Trophy Bonded Bear Claw (TBBC) bonded JSP
and 5.56 mm
Winchester 64 gr solid base bonded JSP (Q3313/RA556B) developed for the
FBI are optimal solutions, the Black Hills 5.56 mm 50 gr TSX loading
and Hornady 5.56 mm 55 gr GMX are also acceptable options. Speer Gold
Dot 62/64 gr 5.56 mm loadings would also work well."
1/7 twist barrels, we've seen the current 5.56 mm FBI 62 gr version
(XM556FBIT3) run 1-2" for 10 shots at 100 yds..."
NATOPROJECTILE: 62 Gr. Tactical Bonded (T3)
CASE: Brass (Copper Alloy No. 260) Visible iris on neck
ACCURACY: Three, 5-round groups with maximum average extreme spread of
4” at 100 yards, using an Oehler M83 Ballistics Computer and
MUZZLE VELOCITY: 3050 fps
INSTRUMENTAL VELOCITY: 2900 +/-100fps (20” Test Barrel)
MUZZLE ENERGY: 1,000 ft/lbs
'From what I understand the original law enforcement designation
(government contract number) was XM556FBIT3 for the FBI. Then the
number XM556SBCT3 appeared that was either the new/current contract
number or the civilian number for the same round. More recently, the
number RXM556T3 appeared which seems to be contract rejects/seconds for
the XM556SBCT3 number. My understanding is RXM556T3 represents
production lots that didn't meet the contract specs, but otherwise fit
barrier blind, FBI issued, ATK/Federal 62gr bonded Tactical load on top
has completely upset within the first 2" of gel penetration,
demonstrating good tissue crush and stretch:"
.223 Defense Ammo Ever? Federal 5.56mm 62gr FBIT3 Gel Test"
"The performance of the FBIT3 shows that it is one of the best choices
for defensive ammo on the market today. The round gave us a similar
performance against three different tests. In bare gel the ammo did an
outstanding job of penetrating and transferring energy. When faced with
barriers the FBIT3 continued to impress. With most ammunition the
introduction of barriers results in a complete failure of the
projectile. The FBIT3 saw a minimal loss in performance. The round loss
roughly two inches of penetration, but was able to maintain similar
expansion and cavitation. Overall the FBIT3 has proven to be a reliable
Best AR Ammo Pt 6 - Federal XM556FBIT3
Best .223 Defense Ammo Ever? Federal 5.56mm 62gr FBIT3 Gel Test