I am kicking around the idea of having a custom rifle built. It is going to be a 300 H&H Mag used for hunting elk and deer in Wyoming. I also like to go out and shoot rocks at long distances...maybe 3-5 shots at a time. I am trying to decide on either a carbon barrel or steel. I like the idea of carbon for weight, as most of my hunting involves quite a bit of hiking, but my hunting can be hard on equipment and especially barrels. I don't know how durable the carbon barrel is going to be. If I go with carbon, it will probably be a Proof Sendero Light at 2 lbs 13 oz. If I go with a steel barrel, it will probably be a Bartlein. I am trying to figure out the contour to keep the weight down, but not sacrifice accuracy. I am thinking a heavy sporter (#3 at 3.5 lbs) with flutes or a medium sporter (#2B at 3.2 lbs). Will I be happy with the accuracy of the these two profiles of steel barrels? I'm expecting to get close to 1/2 MOA. I can shoot 1 MOA with factory rigs all day long.