You can get factory ammunition in both 300Win and 35Whelen with 200gr bullets that are running 2900fps+. So if shots were 300yds and under why would anyone choose a 300Win over a 35Whelen?
Because a 200 gr bullet in a 300 mag is a moose/elk/grizzly bullet and a 200 grainer in a 35 whelen is a deer bullet, you're comparing apples and oranges. It all depends upon what you want to hunt with it. I load 200 gr hornadys at around 2900 fps in my handi rifle 35 whelen because it qualifies for "primitive weapons" deer season here in Mississippi. I'd never shoot 200 grainers out of a 300 win mag at deer, what's the point of that? If I were to use a 300 mag for deer, which I don't, I'd load a tough 150 grainer like an accubond at warp speed and take advantage of it's flatter trajectory. Likewise I wouldn't shoot my 200 gr 35 whelen whitetail load at a moose, it'd probably work but I'd feel a lot better with more weight and sectional density.
