If we are to believe that rate of spin of a bullet affects killing power, the Whelen with it's typical 1/16 twist doesn't look good. I am beginning to believe that, because in the short while I owned two different Whelens, I was pretty underwhelmed by it's terminal effect. I suspect from what I saw that the case does not have enough oomph to push an expanded 35 caliber bullet deep. Personal opinion, but if I had to kill ANYTHING with hair on it at ranges past 100 yards, I'd prefer a 7/08 to a 35 Whelen.