Is the barrel chrome lined? The reason I ask is that my barrel is very rough inside for about the first 4.43" than transitions to shiny as if it were chrome lined, normal?
No, they are not chrome lined. The bore is shiny as it has been polished - a good thing as it reduces plastic fouling from wads. The rough area you mention is the forcing cone, which is the transition between the chamber and the bore. It's not uncommon to see roughness in the forcing cone as it's not as easy to polish as the parallel sides of the bore.