First of all... forgive my serious case of ignorance. I'm just getting into long-distance target shooting/hunting and am still learning.

I know Shaw does custom barrels for just about anything and I was wondering what specifications would be required for a factory barrel replacement with a good bull barrel. I know nothing really of the type of bolt action, the countour, preferred metal type, and/or preferred twist rate (tighter is more accurate, right?). Also... additional gunsmithing options they offer. What is what?

Like I said... I'm new to all of this and I can hear some laughter already.

Or if you've used something else besides Shaw, do tell!