If you want to use normal, run-of-the-mill .44 Magnum ammo (as in Winchester, Federal, Remington, Speer, Hornady, or equivalent handloads) either gun is plenty strong enough and you should choose based on ergonomics, trigger, looks, or whatever other criteria may be important to you. Now, if you want to shoot a steady diet of max handloads or boutique ammo like Buffalo Bore, Double Tap, Grizzly, or Underwood you'd probably be better served by the Ruger. Personally, I own both a 4" 629 and a 5 1/2" Ruger Redhawk and shoot run-of-the-mill .44 Magnum ammo in both because I simply see very little need for the nuclear-level stuff.
Originally posted by Roughedge
In my younger days I shot 200 round of 44 mag every weekend with some friends. I wore out 2 629's in 4 years before I got a Redhawk. It took 5 years before it showed any sign of wear. S&W will not do anything for a gun after 20,000 rounds , the warranty is against defects.
If you could buy .44 Magnum ammo for $30 per 50 round box (and that's an extremely low price today), 20,000 rounds of ammunition would cost you $12,000. Even handloading is only going to save you so much: if I don't count the cost of cases (since they're reusable), my .44 Magnum handloads still cost me roughly $15 per box of 50 rounds. At that price, 20,000 rounds of ammunition would still cost me $6,000. Considering that in order to shoot that much I'll spend the cost of either gun several times over in ammunition, worrying about whether or not the manufacturer will warranty the gun after such a large amount of shooting seems rather silly.
Also, 200 rounds a week is far, far more than the average person will shoot a .44 Magnum. One 50 round box a month is probably a much more reasonable estimate for most people when one considers making time to go to the range, the cost of ammunition, and the average tolerance for .44 Magnum recoil. At that rate, it would take someone a little over 33 years to shoot 20,000 rounds of ammunition. Even at that rate, they will likely have spent more than the cost of the gun in ammunition in 2-3 years.