There's some misconception that the rifle will blow up if the large diameter magnums are used on a small shank rifle. If that were the case, Savage would have recalled every one of the early WSM rifles built on the small shank actions. They didn't. All a large shank does for you is add a little beef at the chamber area to control expansion during firing. This expansion allows the brass to yield, and as the expansion dissipates, the brass becomes trapped in a way, preventing smooth extraction. You may view a hard bolt lift as over pressure when in reality, you're pressures are within limits. Keeping a clean chamber is helpful. The large shank actions are actually thinner, basically weakened, due to the larger thread size, so the amount of metal between the chamber walls and the outside of the receiver is the same no matter which way you build.