Originally Posted by ChrisMichels
If brew target is right, I will be using less hops than what is called for for the partial boil?
Yes. and No.
There's a ton of discussion going on right now about what really causes hops utilization to change, and some disagreement on it. There are new studies coming out showing that it's NOT the case that a full boil increases hops utlization.
In my experience, beers will have a slight difference. In one case I did the same beer with a partial boil, and then later with a full boil. The second beer was much more bitter initially, and when I later ran it through some brewing software, it showed the IBUs jumped from about 15-27 IBUs. That's in software, not in an actual test. Hoever, the beer did taste more bitter than the first one. In a "lighter" beer, that was very noticeable. It did fade with a bit of aging. However, in a higher IBU beer my opinion is that it really doesn't matter nearly as much or maybe not even at all.
In a beer with a relatively low IBU, I think you'd be safe to decrease the bittering hops slightly. On the other hand, I think you'd be safe to NOT decrease them, too. I am really beginning to think it doesn't matter.