Interesting Alternative
About two weeks ago, one of my customers was telling me about his elk hunt from the first season. He used a scoped .454 Casul revolver with the new 300 grain Speer Gold Dot bullets (.452). These Gold Dot bullets are bonded, and he showed me one dug out of a bull elk - that, incidently,went down in two steps. Expanded to a huge frontal diameter without losing any apparent weight. They aren'tvery expensive - less than $20 for a box of 50 - so I ordered some last week.
Today at the range, I tried them with the regular short Harvester sabots (not the crushed rib) over 130 grains of Pyrodex pellets. They shot 1.7" at 100 yards in a fair little breeze - and hit to the exact same point of impact as the 250 Shockwaves with this same charge. This might be a good alternative to expensive premium bullets like the Barnes X or the Nosler Partition HG.