velocity is the enemy to bullet integrity. Higher velocity results in a faster mushroom and/or fragmentation and less penetration. Which is why most bullets perform better from the faster calibers at longer ranges. The solution for close range work is to slow it down, use a heavier bullet (which also slows it down), or use a premium controlled expansion bullet.
I agree with Zach, the partition is a good choice. It has a very wide effective velocity range, and they work well with the higher velocity. Energy transfer is a much debated subject, and i dont believe it to be a good measure of killing ability, but the partition will expand violently at high velocity, cause massive damage due to fragmentation of the nose, and still penetrate deeper than most all except maybe the barnes X type. The partiton is the best combination of all the factors that make up superior bullet performance and sounds like the logical choice to me... and the 160gr is what id pick. :grin:
I have to add... i TOTALLY disagree about shooting through brush with any bullet round nose or not. Brush can deflect all bullets, i dont believe at all the round nose are significantly less prone to bullet deflection. You just cannot predict what will happen, or be sure of a clean ethical kill shooting through brush.