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What is the difference between Frontier 68gr 5.56x45 NATO and 68 gr 223 versions? Velocities are the same. — 2 Answers

by Lee, from TX, United States Asked on August 20, 2022

Name Hornady Frontier 5.56x45mm NATO 68 Grain Boat-Tail Hollow Point Centerfire Rifle Ammunition (5)
$18.89 $13.09 Save 31%
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Answered by Hunter, Gear Expert, from OH, United States, on August 30, 2022

There is not that big of a difference between the Hornady Frontier 5.56x45mm NATO 68 Grain Boat-Tail Hollow Point and the Hornady Frontier .223 Remington 68 Grain Boat-Tail Hollow Point. 5.56x45mm NATO has a slightly different shoulder profile and longer throat which allows it to be loaded to a pressure. The guide at the link below will help explain the difference.
https://www.opticsplanet.com/howto/223-remington-vs-5-56mm-nato-ammo.html

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Answered by Keoth, member, from WV, United States, on February 04, 2025

The 5.56 will produce higher pressures resulting in a faster bullet in a rifle chambered for 5.56 this is because the case walls are a little thicker in 5.56 than in the 223 causing a smaller inside the the case aria wich results in higher pressure

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