The 300 WSM uses 6-7 gr's more powder than the 30-06, and is 200 fps faster. If that means something to you, by all means get the 300 WSM. Really, it's a fine cartridge. Not made for plinking, but then neither is the 30-06. The 300 WSM kicks more to my shoulder, all things being equal. I've taken antelope to mature bull elk with each - both work. But then so too does the 308 Win...
Aside, the 300 WSM, like the 308 Win, is one of the easiest-to-load-for cartridges I've worked with. Accuracy is typically superb.
