The advantage of the Barnes TSX/TTSX is that they are dimensionally equal to heavier bullets, but their lighter weight means they can be driven faster. Typically they penetrate very well, which undoubtedly is a result of their high retained weight. The Partition tries to be all things to all people, and does perform admirably in that the frontal core goes to pieces, leaving a massive wound channel, while the rear core punches through, albeit unexpanded, and light for caliber. As far as I'm concerned when a marginal high velocity cartridge is the question, the monometals are the answer. That said, from a fast twist barrel, the Matrix 120gr should make the .243 suitable for game up to 500 pounds. My experience with Matrix bullets to date has been very favorable, and those 120s have me considering a new 1:7 barrel for my .243; but with so many other projects on the go . . . .