Thanks for the input guys, seems they live up to their billing. I think the 50 Beowulf would be a fantastic sloberknocker for him if he can deal with the 9+lbs weight (he likes to stalk hunt) How does the 50 do on game, does the large caliber make for alot of meat damage or is it slow enough to avoid that problem? Just for my own curiosity how does the performance on deer compare to more conventional cartridges like the 30-06? I would think that a large caliber at modest speeds would be a little less of a bang flopper and more of a very short, very heavy blood trail bullet, but 50 caliber is awful big and might hit hard enough to put them down where they stand even at only 1800fps.
Some day I would love to have a 6.5 Grendel but I am so broke right now my wallet hurts just thinking about it. An 18" 6.3lbs superbly accurate AR with a legit 300+yd effective range would make for one helluva hunting carbine especially in hog country.