They use similar bullets but differ in chamber dimensions and pressure. 5.56 NATO is loaded to higher pressures and is typically safe in a 5.56 chamber only. If you have a rifle marked .223 Remington, check manufacturer guidance before shooting 5.56.
.223 Remington Ammo
Showing 13–19 of 19 resultsSorted by popularity
20-Round
500-Round
$11.99
20 rounds / $0.60 per round
$299.99
500 rounds / $0.60 per round
Out of stock
50-Round
500-Round
2 reviews
$28.99
50 rounds / $0.58 per round
$279.99
500 rounds / $0.56 per round
20-Round
500-Round
1 review
$11.49
20 rounds / $0.57 per round
$274.99
500 rounds / $0.55 per round
20-Round
200-Round
$19.99
20 rounds / $1.00 per round
$189.99
200 rounds / $0.95 per round
20-Round
200-Round
$26.99
20 rounds / $1.35 per round
$259.99
200 rounds / $1.30 per round
20-Round
800-Round
$21.99
20 rounds / $1.10 per round
$829.99
800 rounds / $1.04 per round
20-Round
200-Round
$23.99
20 rounds / $1.20 per round
$229.99
200 rounds / $1.15 per round
FAQs
What is the difference between .223 Remington and 5.56 NATO?
Which bullet weights are best for varminting, target work, and hunting?
40 to 55 grain bullets are common for varmint and high-velocity target work. 55 to 77 grain bullets are popular for precision and medium game hunting, with heavier bullets offering better long-range performance and wind resistance.
Can I use .223 in an AR-15 or do I need 5.56 mags?
Yes, .223 Remington and 5.56 NATO both feed from the same magazines.