That is pretty close to the same ballistics on the 300 WM I get too Fritz. But You missed the part where the elevation was 10,000 ft where most elk are hunted at, that turns a lot of standard cartridges into magnum class ballistics due to the lack of air density. That matters not in this conversation at this point.

Both are fine cartridges no argument there. The only point on the 338 win mag is that running speeds on a 180 gr bullet at 3340fps most reloading manuals say a 338 RUM pushes them at. There's a lot more case capacity in a 338 RUM. I have a lady friend that has won the 2200 yard match at Whittington Center using the 338 RUM. I believe she was using 250 gr Berger bullets though. It really don't matter what a person chooses to use as the tool as long as they crafty with it. If you reload of course your going to make rounds superior than factory ammo. If your 338 WM was a reload and my 300WM was a factory load. I would have to say you would have the advantage and vise versa. Compared to what most hunters use in the field coming off walmart shelves, what we are talking is whole other world of ballistics. I concede and move on.