[rodwhaincamo]

Christchild: I like the idea of the 180 grn bullet for several reasons.
1) I can afford a little weight loss and still penetrate fairly well, especially were it to break up on bone.
2)Nice sectional density. My understanding is higher SD's penetrate better.
3) I can figure bullet rise/drop much better than wind drift. The 180 has a better ballistic coefficiency, thus less wind drift. The 168's are nice, but come with a higher price tag.
It's not that I feel a lighter weight bullet is nearly useless. Just that I'd like a little leeway since I'm not using a powerhouse. I would use a 165 gr bullet were it bonded or solid.

Pongo: Petzal's article in Field & Stream Aug '05 claims as a downside to it, "Because it loses considerable weight as it expands, it does not penetrate as well as some other bullets, and it leaves a small exit hole that does not always give a good blood trail."
For the cost of Partitions I'd get a bonded or solid bullet. They won't lose the ratio of weight and in theory would penetrate better if needed. This is why I don't believe they are worth the expense.
Were I to want something like that I'd chose A Frames.