The Savage Long Action 111 will also fit into the
Choate Tactical Stock for $229; just make sure your action uses the staggered feed. Weight-wise they run at just around 4lb. These stocks use a 'full length' aluminum bedding block, and can provide many of the advantages you might otherwise find in a chassis, but an AR style butt stock capability will not be among them. IMHO, they are probably just another thing that can break, and I don't use them aside from my actual AR's. If you disagree and go for a chassis, the
Luth AR MBA series of adjustable butt stocks are a great choice.
The .30-'06 with the 1:10" twist and 178gr ELD-X will provide good to great performance to 1000yd and probably a good bit beyond.
The question will be about barrel profile. If your barrel is a sporter, you most likely will benefit from a longer and somewhat heavier profile, but if you are looking to compete in a discipline requiring moving around and shooting, the really heavy contours might not be ideal. With the '06 and the 178, recoil is going to be an issue for any sustained strings of fire, and a heavier weight barrel contour can help with absorbing some of that; along with the inevitable trade-off being that they are more weight to carry.
As for the AR, an LR capable Upper is called for. Mine are the Stag Model 6 Super Varminter, discontinued, but otherwise indistinguishable from the
Stag 15 Varminter, $427.47 with BC and T-Handle. It uses a 24" long, 1:8" twist Stainless Bull Barrel. Mine has shot 600yd F T/R with ease, is both accurate and reliable, and has none of the potential issues that can crop up when one chooses to build their own. I live at 4200ft ASL, and
on paper, the Hornady 75gr HPBT-Match is still supersonic at 1000yd, but this is not true when one is shooting at significantly lower altitudes. Heavier/longer bullets should also stabilize in this barrel, but beyond the size of the Sierra 77gr SMK, may have trouble fitting and feeding properly in the magazine. However, those longer OAL's shot have a good chance of working with a single feed magazine follower, or a
SLED. The sled is marked 10rd or 20rd, but neither holds any rounds, the rounds reference is about the dimensional profile of the device itself.
You can go deep into the pocket for optics, but the
Weaver Classic V-24 works very well on mine. My other Stag 6 Upper has the
Mueller 8-32x44 Target Dot 30mm tube scope.
The only item linked in this post that I do not have 2 or 3 of is the Weaver V-24. They all work well and none have ever failed on me.
Greg