The link no longer shows the round, but I know the one you are talking about. I did a side by side comparison of 4 different factory rounds. That post:
http://www.450bushmaster.net/viewtopic.php?f=2&t=16584.
Of the four factory rounds I tested, my rifle liked the Federal Fusion 260 grain the least - but we are talking about a 2-inch group at 100 yards versus a 1-inch group, so they are good rounds. I did notice that the soft point tends to get deformed just the smallest bit when it hits the feed ramp before going into battery, so that might be the reason my groupings opened up a little.