The small difference with significant impact. You can use .223 in a 5.56 NATO, just not the other way around.
We currently offer .223 remanufactured ammunition in 55g FMJBT and 75g BTHP Match grade round. The main difference between .223 and 5.56 are cartridge pressure and muzzle velocity, 5.56 cartridge pressure and muzzle velocity are higher. I’ve test both bullet weights out of rifles with 11.5”-16” barrel with great results. Our 55g FMJBT averaged 2900 FPS and 75g BTHP Match averaged 2500 FPS. 5.56 muzzle velocities are about 200-300 FPS faster. If you have any questions let us know.
What you should know about .223 Rifle Ammo
Posted by Chris on Nov 30th 2023
