I hand load my 300win w/ 180grs and crony 3200ft/sec. Had some hotter, but signs of preasure talked me out of it. I'm sure you can do better w/ the RUM, but not much. To get a distinct advantage you would have to go w/ the 30-378. the ultra is the top of the batch(WIN.,WEATH.,RUM.)but it is definately still in the same class. The RUM does have a clear glamour factor going for it and ALL 300mag hit hard. My only point was that the writers all said it was right on the heels of the 30-378 and not close at all to the win and weatherby, which isnt the case.