Think about it this way - a Peterbuilt 579 semi-tractor is more powerful than a Ford F-150 pick-up truck, but it sure doesn't make sense to commute in a semi. A semi-tractor is designed for one purpose, the pick-up truck is designed for another. A GE Evolution Locomotive Engine is even more powerful, but it's pretty hard to park a train engine in my garage.

Similarly, the CheyTac Intervention M200 in 408Cheytac, like the Peterbuilt Semi, simply isn't a hunting rifle. It would be a novelty at best to carry such a rifle for hunting, even of the largest game.

So is the 408CT more powerful than a 416Ruger? Sure. So is a 76mm cannon. Does that make it AT ALL suitable for hunting? Nope - purely a dumb idea.

Now, one other thing that's absolutely worth pointing out - the Chey Tac Intervention weighs over 20lbs empty, a proper hunting rifle in 416 Ruger, Rigby, Remington, or Weatherby will tip the scales around 10lbs scoped and loaded. What that means - even though the .408Cheytac is considerably more powerful, it actually recoils considerably less than the 416's. The recoil energy of the 416 is ~30% greater than that of the 408CheyTac.

I've been very curiously watching this thread, as it's absurdity makes me question whether Phil is trolling or serious. No one that has "a lot of experience deer hunting" would ever consider a 408 CheyTac as a hunting rifle.

I personally would only recommend the 416 Ruger if you're wanting it in a standard long action rifle and don't want a Magnum length action (which if you're actually considering a 408Cheytac, you're obviously not shy to overly-long rifle actions). The staying power of the 416Ruger is debatable, and frankly, the ammunition sources are few and far between. While more common than a 408 Cheytac, the 416Ruger is far less common than many other suitable bear cartridges. The 338win mag, or 375H&H are easily found at most gun shops, and the other 416's like the Rigby or Remington are typically easier to find than the Ruger. I love Ruger rifles and love Ruger cartridges, but if you're not willing to buy ALL OF THE BRASS YOU'LL EVER NEED right now while it's semi-available, then possibly end up reloading it for the rest of your life, or not willing to buy a rifle that will be all but worthless after the .416 Ruger goes the way of the do-do bird, then I'd say you're better served to buy a CZ550 in 416Rigby or 375H&H than the Ruger Guide Gun in .416 Ruger.