Are you speaking from running them over a chrony out of your rifle or what the box tells you? I suspect the later since that is what is on the box! You may be suprised if you run themacross a chrony. Even if the numbers are remotely close on the boxes the difference between the 2amounts to very little. I don't think you'll find to many that have found the 300wsm out performs its300 wm counterpart in terms of performance levels but it does offer differences with similar performance of upto 180 gr bullets.If yougo above the 180 gr bullet class the 300 WMgets the nod.

Nothing wrong with either of these cratridges IMHO and game won't know the difference as stated previously. I think both have a place in the market and will be in demand for years to come.