A .223 Wylde chambered barrel is ideal as it can handle .223 REM and 5.56 NATO very well. You will find that many AR-15 precision barrels have .223 Wylde chambers and 1/8 twist. A 1/8 twist barrel can handle some the lighter loads better than a 1/7.
"A Bad Day At The Range Is Better Than A Great Day Working"
USMC Force Recon 1978-1984
US Air Force Res. 1995-2004 (Air Transportation)
M16/AR15 shooter since 1978, gun collector and AR builder since 2004
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