My understanding of those bullets is that even the 150's will give more than enough penetration. The important factor is impact velocity, not energy. It needs to be around 2000 fps and most guys say 2200 is better in order to get expansion. According to my calculations the 150s will drop below 2200 fps right at 400 yards. The 168's a little under 400 yards. Assuming those impact numbers are accurate around 425-450 yards is about the limit for either of those in 30-06. Started faster in a magnum would add a little more range.
I confess, I've not taken any game when either was in my rifle, but I have experimented with 150's in my 30-06 and 130's in my 308. I'd save the 168's for magnums. But I don't think either would be a bad choice.
