Say Mike, why wouldn't you go for a heavier profile with these blanks? I have a couple of PTR .308 receivers tucked away. I thought of a PSG-1A1 or MSG90A1 type of build with one of the receivers. Why wouldn't you Nitride the barrels? Doesn't that process bring the carbon to the surface and make the bore more resistant to wear? What would be the downside of the Nitride process?