The Core-Lokt Ultra is something else altogether. I've run penetration/expansion tests on them, and they duplicate the results you get from Nosler Partitions. I mean there is no difference. I'm puzzled by the .308 bullet in question. A couple of years ago, I shot a bull elk in the shoulder at 200 yards with a 250-grain Core-Lokt (not Ultra) from a .338 remington Ultra Mag, and it broke the shoulder, killed the elk on the spot, and held together just fine.
Bullets are the most important thing you take on a hunt. If your bullet doesn't perform right, everything else goes out the window, too.
