But that's the advantage of copper/copper alloy bullets. You get same results as lead, but with lighter wght. And the increased velocity makes up for the energy loss of the lighter bullet. I would be interested in there test results of the new bullets on big game animals. And if they haven't tested them real life I would not buy them yet. I've used 210gr Speer Gold Dots in my 44 Mags and have had excellent performance on deer. The only bullet I've recovered was on a mature doe hit frnt of left hind and angled through to opposing frnt shoulder. Bullet found just under the hide. Perfect mushroom. And she didn't go far. Fifty yrds. Most of my shots are broadside and the 210gr Gold Dots blow right through.