Well for starters how many 338 lapuas and various ultra mags and other wild cats, even the 416 based big weatherbys have been put on a remington 700 action? Answer I dont know probably tens of thousands. There is .005" difference in a standard savage and a remington 700. The advantage going to the savage with slightly wider, much longer locking lugs, but they still work on the 700s. as far as chamber movement it is as I stated small or large shank people are trying to hang 30-32" barrels weighing 6.5-10lbs from these actions and they do not like that without a 2 or 3" barrel sleeve for support, neither does the remington. I am finishing up the stock on the 270 wby mag I just built off of a model 116, i'm loading 140grn accubonds at 3430fps with 74grns RE22 with no pressure signs at all, could probably go 75-76grns but do not want to lose accuracy, the load im using is probably pretty close to 70,000psi, i have yet to have an issue. Most smiths use the small shank to build on your losing a whopping .065" of metal around the chamber, by the time its threaded i dont even think by just looking at the barrel you could tell hardly and difference without a caliper or mic. You do what you want but I will stick with the standard shank, 1.055" vs 1.120" real big advantage!