Bulk 5.56x45 Ammo
5.56x45 NATO Ammunition
5.56x45 ammo derived from the .222 cartridge and was officially adopted as the standardized NATO round in 1963. Essentially, 5.56x45 as a caliber came into being because the military was using 7.62x51 and critics believed the larger round was too powerful for light service rifles, leading to rough recoil and a slower than desired rate of fire in military service rifles. Today, the NATO standard cartridge is designated as “M855”. You’ll often find it in-stock and available to shooters. We also carry a huge in-stock selection of .223 ammo for sale here.
[Read More]-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193
Regular Price: $499
On Sale: $450
82 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Fiocchi - 55gr FMJBT M193
Regular Price: $529
On Sale: $454
78 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by PMC - 62gr FMJ M855
82 Ready to Ship
-
900 Rounds of 5.56x45 Ammo by ZSR - 55gr FMJ M193
$415
3 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Prvi Partizan Rangemaster - 55gr FMJBT
$239
31 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by PMC - 55gr FMJ
$479 As low as: $475
85 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Prvi Partizan in Ammo Can - 55gr FMJBT M193
$479
76 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193
$489
80 Ready to Ship
-
800 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ
$399
30 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ
$499
81 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ
$499
81 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo In Plastic Battle Packs by PMC - 55gr FMJ
$528
11 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ
$264
30 Ready to Ship
-
125 Rounds of 5.56x45 Ammo by Prvi Partizan Rangemaster - 55gr FMJBT
$66
339 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester USA - 62gr FMJ M855
$534
84 Ready to Ship
-
1000 Rounds of 5.56x45 Ammo by Winchester - 62gr FMJ M855
$539
54 Ready to Ship
-
840 Rounds of 5.56x45 Ammo in Stripper Clips by PMC X-TAC - 55gr FMJBT in Ammo Can
$455
80 Ready to Ship
-
50 Rounds of 5.56x45 Ammo by Fiocchi - 55gr FMJBT M193
$28.50
107 Ready to Ship
-
200 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193
$114
80 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193
$13.50
132 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by PMC - 62gr FMJ XM855
$14.25 As low as: $12.75
167 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Prvi Partizan - 55gr FMJBT M193
$14.25
126 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester - 62gr FMJ M855
$14.75
107 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester - 50 gr Frangible
$15
129 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Hornady Frontier - 75gr HPBT Match
Regular Price: $409
On Sale: $375
84 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Winchester USA - 55gr FMJ M193
$15.25
135 Ready to Ship
-
500 Rounds of 5.56x45 Ammo by Hornady Frontier - 68gr BTHP Match
$394
76 Ready to Ship
-
420 Rounds of 5.56x45 Ammo by Winchester in Ammo Can - 62gr FMJ M855
$374
75 Ready to Ship
-
200 Rounds of 5.56x45 Ammo by Hornady BLACK - 62gr FMJ
$189
33 Ready to Ship
-
20 Rounds of 5.56x45 Ammo by Hornady Frontier - 75gr HPBT
$20.50
43 Ready to Ship
-
200 Rounds of 5.56x45 Ammo by Hornady BLACK - 75gr InterLock HD SBR
$234
15 Ready to Ship
-
200 Rounds of 5.56x45 Ammo by Hornady Superformance Match - 75gr HPBT
$254
70 Ready to Ship
5.56x45 Ammo Types
The majority of 5.56x45 rounds sold today are full metal jacket (FMJ) or full metal jacket boat-tail cartridges. Incredibly fast, with a muzzle velocity that’s generally more than 3,000 feet per second, you’ll find 5.56 ammo with a 62-grain projectile as well as lighter rounds with a common 55-grain bullet. In either case, you can expect muzzle energy to be in the ballpark of 1,300 foot pounds.
.223 Remington vs. 5.56x45 Ammo
While the civilian .223 Remington round is very similar, it is not the same as 5.56x45 ammunition. The two cartridges are loaded to different pressures when adhering to SAAMI (Sporting Arms and Ammunition Manufacturers Institute) specifications. Because of that difference in pressure, you may run into trouble if you elect to fire 5.56x45mm NATO rounds from a chamber with a shorter .223 Rem leade.
Popular Rounds for Sale at BulkAmmo.com
5.56x45mm is one of the most popular calibers at BulkAmmo.com. While there are a number of reliable rounds, the most popular manufacturers of the NATO round tend to be produced by Lake City, Federal American Eagle, and PMC (Precision Made Cartridge).