I don’t think anyone could claim that a .35 Whelen matches a .338wm “ballistically” - by any actual measurement the .338wm would appear superior. My point would be that for shooting targets - .338wm has a clear advantage but in actual Hunting and killing Elk the difference between the two is much less. Either has more then enough power to cleanly kill Elk out to 300 and even 400 yrd. and most Hunters can Not consistently make good shots past 300 yards in actual hunting situations. In favor of the .338wm are superior ballistics, in favor of the .35 Whelen is “everything else” ie: Less recoil, bigger hole, plenty of power. 35 Whelen would be “as effective” killing an Elk as a .338wm out to 300 yrds. Note “effective” does not mean equal ballistically, bullet placement is by far the most important consideration - a .243 in the lungs beats a .416 mag thru the guts everytime. I’ve read that for the “average Hunter” a .30-06 is about as much recoil they can handle without shooting accuracy being affected (flinch). Another interesting article I read was that in the 1930s the .30-06 was one of the FIVE most popular calibers used the hunt Elk and in the 1990s it was still one of the FIVE most popular calibers used for Elk...the big difference was that in the 1930’s it was the MOST POWERFULL caliber used and in the 1990s it was LEAST powerful. The Elk haven’t changed but hunters perceptions have - reading magazines & marketing have convinced some modern hunters that we “need” a magnum. I don’t disagree that most magnums are superior ballistically but maybe they aren’t always needed and many Hunters would shoot better with a lighter kicking rifle. Just my opinion and I’m No expert, while I tend to hunt with more traditional calibers - I certainly enjoy modern optics, rangefinders, and other helpful inventions of the last 30 years. I also have hunted with a .470NE and .375 H&H so I’m aware powerful rifles add value to certain hunting situations.