500-600 yards is really not too big of a deal...especially on Elk sized game so I would go with a thinner contour barrel to help with weight. If you stick with a "Savage" style contour barrel you could go with their "magnum" contour barrel and finish it around 22-24inches if weight is a concern. My wife's rifle is a 7mm08 savage built with a heavier wooden stock and a short 20in magnum contour savage barrel that we had built from Apache gunwerks. That gun weighs in at 8.8lbs with a 3-9x40 leupold VX II unloaded. That barrel shoots .5-.65MOA all day long with no load work up (I basically threw a load together or use factory loads). I bet it would be sub .5MOA if I actually put effort into load workup. Even though 6.5 can certainly take elk and many will say go for the 6.5 creed, personally I would want something with a bit more power if Elk is a main target. If I were you I would be eyeballing a good ole 7mm rem mag barrel. Why change what isn't broke. It has plenty of power to kill Elk and yet is not big in recoil (even in lighter setups). If Elk will be a rare target and whitetails will be the main target then go for the 6.5 creed. Do you have the Savage Accutrigger? The blade thing can maybe bit a little annoying to some but every accutrigger I have breaks at a nice 2.5lbs and is very crisp. Google Savage target trigger springs. Those will allow you to drop your savage accutrigger below 3lbs if your current spring does not allow that and that is what you desire. I have never seen the need to replace the savage trigger unless you want to be in the ounces trigger pull range (which personally I would never hunt with). I built a savage 7mm rem mag with a criterion light varmint contour and while that thing shoots laser beams (.25MOA is common) it is just too heavy for what I want (Weighs in at 11lbs with scope). Like I said above 500 yards really is not too long range and you do not need a LONG-RANGE dedicated rifle to get there. A regular old Remington 700 with a traditional wooden stock can do it no problem. Now if you want a dedicated long range rifle, then by all means go with a more "long range" style stock but remember these will be heavier for sure. I don't care what anyone says...slinging a heavier rifle can be a pain and I rarely take my heavier savage into the woods anymore.