I used the 200 ELD-X in my 300 WM for a cow elk hunt. Took a cow at 225 yards through the chest. JBM Ballistics said my bullet was at 2660 fps at that range. Bullet core separated from jacket. I called Hornady to discuss what I consider a bullet failure. They said I exceeded "maximum impact velocity" for the bullet. Remember, their advertisements show bullet expansion at 2660 fps! So I asked what "maximum impact velocity" would be for the 200 gr ELD-X, and they told me 2300 fps! When I asked if I was supposed to let everything walk out to 400 yards before I pulled the trigger, their response was that "for close-up shots, I should use the GMX!" I switched to a bonded bullet and never looked back! Used the bonded bullets with predictable success on 6 plains game animals in South Africa and 5 more in New Zealand. Hornady would have a great bullet, if they used a better method to keep their cores from flowing out of the jacket!