Alot will depend on what type of country you are hunting, what kind of a shot you will be presented with, as this bunch knows, Velocity is what makes a bullet expand, it just depends on how much speed your gonna have when the bullet hit's the animal, SST's, the early 90's Ballistic tip's some of the modern day soft point's even, as has been posted, will expand to prematurely if the speed is high will expand at to high a rate for the amount of penetration needed to reach the vital's on a specific size game animal. So often when you have an elk at 40 yard's, even some of the most strongly constructed bullet's will not perform as advertised meaning even they will open to quickly and not penetrate. but if the elk is 150yd's away, that same controled expansion bullet will perform perfectly. This is magnified ten fold with a non-controled expansion bullet. An SST that way's 165gr shot out of a 30-06 at 2850fps will work fine.....if our elk is 200 + yards away, because it has slowed to 2300fps, but if it hit's an elk's rib's going 2700fps, you could have problems. I agree accuracy is probably the most important thing, but when you are hunting an animal with a vital area the size of a basketball, you can afford to give up some accuracy even for longer shot's. I agree with the Partition guy's, killed lot's of animals with them, they alway's work no matter what the distance and speed. I know I said the sierra's will do just fine, and I am standing by that, I have used them alot only because my gun also likes them, And they are'nt as explosive as an SST or like bullet's, many of us know that from experience as well, but a partition is a better choice.
Hope this help's
booner.