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Posted On: 2/11/2021
By: harry cuda
A: Thanks for reaching out Harry! Muzzle velocities do fluctuate depending on the barrel, and even on the individual cartridge, but I can confidently estimate this ammo should give your 16" barrel a muzzle velocity between 2,850 and 3,100 fps.
Posted On: 1/23/2021
By: Beth M Dryden
A: Thank you for reaching out Beth! 5.56x45 is just the fuller name of the cartridge. You may see it referred to as 5.56x45mm NATO, 5.56x45mm, 5.56x45 NATO, 5.56 NATO, or just 5.56, but they're all the same exact thing. And just so you're sure, a rifle chambered for 5.56x45 can also fire 223 Rem (aka 223).