hey tug,
depends on what you plan on having on the "business end" of the muzzel. if the 2 legged variety of creatures will be your target,(for defensive applications)... i would look into the Hornady 155 gr TAP (with AMAX bullet).
fragmentation of the 155 gr bullet, as quoted from an earlier thread (which i couldn't find) has been called "scary." there are pics of the gel block, as well as recovered fragments... try and find them, it would be worth it.
now, if penetration is of utmost concern, then look into the failsafe line from winchester, AKA black talon, these rifle bullets look similar to the swift A frame, or the nosler partition, BUT have a steel cup protecting the lead core. [url=http://www.biggameinfo.com/Images/FailSafe.jpg]pic[/url] this will give you penetration and weight retention, but NO fragmentation.
i hope this helps.
Stainless