Does anyone know which chamber (.223 or 5.56) the Shaw barrels in J&Ts kits have?
Oddly, there are few or no markings on their barrels. One I have is completely unmarked, and one has "J&T" plus the twist rate.
Their website recommends using any "Nato spec" ammo... I have never had problems with any ammo, including IMI surplus that seems rather hot.