There has been some discussion on this caliber, so I thought I would post what Boddington said in his Safari Rifles. " I have used the rifle on moose, elk, black bear, and wild boar, and it's one of the surest killers I've ever used. Its 250 grain bullet has the weight and the frontal area, and it does wonderful things without undue recoil and muzzle blast. Out to 200 yards, I would rate it the equal of the .338 Winchester Magnum. It would not be a good choice in open country, but in the mixed thornbush common in much of Africa, it would be ideal."
" Within a few months of its introduction, Remington took some 25,000 orders for .35 Whelen rifles, far more than they were prepared to produce! "
P 46-47. Other interesting comments there.