# Can you shoot 5.56 in a .223 Wylde barrel?

**Verdict: Yes**

Yes. That is the entire reason the chamber exists — it takes 5.56 NATO and .223 Remington safely, which a .223 Remington chamber does not.

This is the same question as shooting 5.56 in a .223 chamber and it has the opposite answer, because the chamber is not the same chamber. .223 Wylde is a third specification, cut deliberately to take both cartridges rather than to favour one.

It works by mixing the two specifications rather than splitting the difference. The freebore LENGTH and the leade angle come from 5.56 NATO — 0.0619 inches of freebore against .223 Remington’s 0.0250 — and that length is what lets the higher-pressure round build pressure gradually enough to be safe. The freebore DIAMETER comes from .223 Remington at 0.2240 inches rather than 5.56’s 0.2265, and that is the part that keeps accuracy with .223 match ammunition.

- **5.56 NATO in .223 Wylde** — Safe — the chamber is cut for it
- **.223 Remington in .223 Wylde** — Safe, and accurate
- **5.56 NATO in a .223 Remington chamber** — Not safe — a different chamber and a different answer

> **Caution:** Verify the barrel is actually .223 Wylde rather than assume it. A barrel marked ".223 Rem" is a .223 Remington chamber, and for that chamber the 5.56 answer reverts to no. Where the marking does not say, the maker’s specification does — this is not a chamber to infer.

## Sources

- [.223 Wylde chamber — the hybrid leade specification](https://en.wikipedia.org/wiki/.223_Wylde_chamber)
- [Unsafe firearm and cartridge combinations — the .223 chamber entry](https://en.wikipedia.org/wiki/Unsafe_firearm_and_cartridge_combinations)

## More on ammunition and chambering

- [Can you shoot .380 ACP in a 9mm pistol?](https://www.tactgpt.app/answers/380-acp-in-a-9mm-pistol.md)
- [Will a 300 Blackout round chamber in a 5.56 barrel?](https://www.tactgpt.app/answers/300-blackout-in-a-556-barrel.md)
- [Can you shoot 5.56 in a .223 chamber?](https://www.tactgpt.app/answers/shoot-556-in-a-223-chamber.md)

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Last checked 2026-09-03. TactGPT can make mistakes. Always check important info for accuracy. The information it provides is intended for educational purposes only. It does not give legal advice; verify any laws cited. Always follow all applicable laws and safety guidelines.

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