[mavracer]

Because kenetic energy really is not the end all measurement for ballistics. It was pushed by Roy Weatherby and his hydrostatic shock theory. Momentum plays a large roll in penatration and the 147gr has more momentum. Since energy is defined as the ability to do work , part of the work done is to enter the body and exxpand the slug since more of the 124 gr bullets energy comes from velocity it loses more velocity preforming this work. Which is why if you look at wound chaannels the 124s will be slightly larger early in it's path. But now momentum takes over for penatration that's where big bullets shine because they're still heavier. Look at the various gel penatration test and check out the actual damage done they're a lot closer than energy figures.