the 300Win mag IS bigger than the 7mag, the logic argueing they are the same would also say that there isnt any diifference between a 243 w/ a 105 gr bullet and the 25-06 w/ a 120gr bullet so then 243 must also be equal to the 7mag w/ a 150gr, we all should know there is a difference. Having said that the 7mag is great for elk, the 300 is just better. The 35 whelen is a good thumper too. If you like your 7mag, like your 35 whelen, then you'll love a 300win mag, its right in the middle, shoots flat like the 7mag, thumps like the 35 whelen.Enjoy it, my experience is that the rifle and load will be a bigger factor in recoil than the difference in caliber. All three of these calibers can kick.