My normal hunting stick is a Styer Mountain Rifle in 25-06 with a 3-12 50mm optic. It is right at 7lbs. That's a fairly light rifle for a long action and a large optic. I also hunt with an old 03A3 that has been sporterized, and is also about a 7lb rifle. I have no doubt that there are several chassis options out there that will fill that bill, but I wonder how much a chassis rig like the MDT weighs with a 700 LA and sporter barrel with optics? Or, do you have to have a Proof carbon fiber barrel spun up to keep that weight down? Additionally, my rifle was about $600.00 new, not including optics. How much is an MDT chassis? How much is Proof barrel chambered and fitted? Does it do a bunch of stuff that you really need a hunting rifle to do? Maybe it does, and maybe I'm just old fashioned and behind the times, but then again, maybe I'm just pragmatic and have a hard time justifying the purchase of a firearm that doesn't really outperform my traditional firearms to the point that they justify their substantial cost. Beauty is in the eye of the beholder, and my above comments and musings are not meant to be incendiary or provocative. It is simply my perspective imparted to the readers of this thread.
Sporter barrels and carbon barrels generally weigh the same or close to it. The advantage of carbon is the fact you have a much more rigid barrel that doesn't walk when heated up, can handle heavy muzzle devices, and doesn't rust. It's not a requirement at all unless running a suppressor or brake. You have to have at least enough material to thread the barrel.
Chassis vs tupperware or wood stocks. Rigid is the name of the game. Most factory rifles sport a cheap plastic stock that is super light. Some shoot and some don't. This is why there is a pile of high end stocks developed with rigidity in mind for accuracy. Same as pillars, bedding, etc. Wood stocks can be an issue in extreme temp and moisture changes which is why synthetic stocks are generally accepted as better for bad climates. A chassis deals with all that crap like a champ. Rigid, light, doesn't need bedding, adjustable.........
Performance: Very subjective. This is a long range hunting page. Most LRH folks are not looking at a traditionally acceptable hunting range rifle. They are looking for ultra high precision long range rifles for extended ranges. People spend countless hours fine tuning hand loads, using high end glass, cool tech and gadgets, etc to shoot tiny groups way beyond traditional hunting range. Can all this be done with a oem cheap rifle...... Yep. Been there, done that, still have them in the safe.
The issue being brought up is that chassis in the past were pretty heavy. Most were 4-6 lbs when all set up. As a result people strayed away from chassis for hunting even tho that is the direction they went for ultra high precision rifle shooting. Seems very counterintuitive to me anyone excepts less accuracy out of their hunting rifle then they do a comp rifle. I want my long range rifle to be ultra precise since I plan to make 1 clean shot at hella long ways. As a result I hunt what I train with and I prefer a chassis. I have zero issue shooting a trad stock as well, just have my preference for how I set up for shots, how far I pack a rifle, and how far I generally shoot. So in the end I can stick a remington barreled action in a chassis that doesn't add much if any weight over a cheap oem stock. Which I mentioned 1.5-2lbs. Many of the stocks I have replaced that are el cheapo crap are close to 2 lbs with bottom metal etc. So, if a person wanted a chassis but thought they were too heavy, times have changed. Don't want one, don't need one, don't get one.