MistWolf,
You totally missed my point!!! Light Weight is EXACTLY why I bought the 811310. Out of the box its weight is exactly the same as the light weight Pencil barrel models; 7.71 lbs. Don't believe me? Check the specifications from S&W. The amount of metal removed from the barrel in front of the gas block to make them a "pencil " profile weighs right at 4 ounces. The long flash hider they put on the pencil wt. barrel weighs right at 4 ounces. Thus, the "heavy barreled" 811310 model without the flash hider weighs almost exactly the same as the "light weight Pencil barrel" models with the flash hider. My gunsmith removed right at an ounce of metal from the barrel when I had him thread it. The "Manticore Nightbrake" I installed to control muzzle rise weighs only 2 ounces, & is 1.5" shorter than the S&W flash hider. Thus, for only an increase of roughly 1 ounce over the pencil barrel models, I have what you just called a "heavy barrel" which better resists heat, is 1.5" shorter overall, and also has one of the most effective comp./brakes on the market. With my comp/brake installed, my 811310 "heavy" barrel weighs only 7.75 lbs. I've got a friend who has one of the "Pencil" profiles. It weighs 7.71 lbs. A five-shot 100 yard group with my "Heavy" will almost always beat one from his "Pencil". (his fifth shot often opens the group up about an extra inch or so. ) Thus, the model 811310 sounds like the best of both worlds to me (lightweight & sustained accuracy).