No, not personally. However, I did order one for my hunting buddy when I still had my FFL. It was a Sako and was a really sweet shooter. I witnessed him take a couple moose over a few seasons with it. As you probably know, a moose usually doesn't know he's really dead, for a while after it happens. Both these big bulls dropped like a stone. One of them was just about ready to mount a cow, excited as all get out. I figured it would take a pound of lead to bring him down in that state. However, I was wrong. Kind of sad and funny at the same time. I might have waited until the bull finished his business but, that's me. Although, the cow gave us a pretty dirty look and hung around to see if he'd get up and still give her some!
Personally, for a heavy hitter, I prefer the .378WBY. I'm really fond of the .375 bore. On several safaris I've been nicknamed the butcher in the regional native tongue. I've never needed more than one shot and the animals rarely take a step. This is true on animals that are notoriously hard to bring down, like Eland. It certainly isn't a meat shooters gun and ruins very large amounts of what would have been good eating. Ergo the butcher moniker.
Several have mentioned that these types of rifle aren't no .50. True, but try lugging a .50 around all day in heavy brush or up and down mountains. Also, in my opinion, stationary long rang sniping of game animals is not exactly sporting.