What Is The Difference Between 556 And 223

Richard douglas is the founder of scopes field a blog where he reviews the best scopes and guns on the market.

The 556 is also a little heavier which means that the effect of the atmosphere on its trajectory is less than it is on the 223 trajectory. Differences between the two are small but can have a large impact on performance safety and weapon function. Has much the same effect as radically changing the bullet seating depth in handloaded. There are some differences you ll notice right off the bat between 223 remington and 5 56 nato ammunition.

A 223 remington is loaded to approximately 55 000 psi. The difference in freebore length usually 0 0566 inch for the 5 56 nato and 0 025 inch for the 223 rem. As we can see from the picture above the throat of the 5 56mm bullet is slightly longer than that of the 223 rem. On the case rim you ll notice 223 stamped on 223 remington brass where 5 56 nato brass may only have a date initials ex.

By contrast 223 remington tends to produce lower chamber pressures between 52 000 and 55 000 psi going by saami specs. Standard cartridge dimensions for 223 and 5 56 are identical. The second and most important difference between the two is the fact. Therefore less internal volume.

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223 vs 5 56 ammunition. Now that you understand the difference between te 223 vs 5 56 which one will you choose. This means the 5 56 travels a longer distance when the two are shot in the same atmospheric conditions. Fc and one or more symbols.

In a rifle chambered for 223 remington the round produces chamber pressures upward of 70 000 psi if going by saami the sporting arms and ammunition manufacturers institute standards. The first difference is the higher pressure level of the 5 56 nato cartridge which runs at approximately 58 000 psi. Maybe you ll choose the 223. It will simply cause pressure problems.

Either way let me know in the comments down below. First though the 223 remington and the 5 56x45mm nato are technically different cartridges the practical difference in performance between the 223 vs 5 56 is very small and doesn t make any difference for the purposes of this article. Therefore potential for higher pressure with an identical load. However a 223 remington runs at approximately 55 000 psi.

The difference is in the wall thickness of the case mil spec is thicker. The significant difference between the two is that 5 56 has a higher pressure level which runs at just about 58 000 psi. Thus it is ok to fire 223 rem rounds from the 5 56 chamber but it is not ok to fire 5 56mm rounds thru 223 remington chamber. 223 vs 5 56 stopping power.