Question fro Mr. Randall Rausch
I am building a new Stainless Steel 12,5" barrel from a Delcour (Belgian barrel maker) barrel blank.
1/9" twist. 5,56 Target chamber (JGS reamers). Barrel diameter at the fsb. 0.750".
I will only use 5,56 NATO pressure ammunitions.
I would like to know Which gas port diameter you will recommend for that particular configuration?