I'll first say that I don't use any of these newer bullets from any of the manufacturers. But, having seen their performance for the first time last year, I won't be rushing off to start using myself them any time soon.

The DO penetrate very well. None of the animals we shot with them didn't pass-through. However, they seemed to do about as much damage as I'd expect a FMJ to have done on that trip through the ribcage. We weren't able to recover any of them, but I suspect that very little expansion took place. I've experienced the same thing using 300-grain, heavy jacket Barnes (old stock) bullets in a .375 H&H on elk. One of those elk was the longest trailing jobs I've ever had. We trailed every animal hit with those bullets last season, too, and were able to recover all but one. Conversely, every animal we hit with Partitions and other "traditional" bullets went down a rock's-throw from the point on the ground they were hit. In the end, dead is dead, but that one animal that did elude us probably wouldn't have had the hunter been using cup-and-core bullets (shot was less than 100 yards, .300 WSM).

It's just my feeling now that those bullets are "too tough" for the situations I expect to encounter when I'm hunting. I'm sure lots of guys are using them effectively, but I wasn't as impressed with them as I am concerned they don't work as well. I also prescribe to the school of thought that pass-throughs are for bowhunters (we've had debates in camp during bow season over traditional broadheads versus expandables, too - I tried expandables and am now back to my Muzzys).

Maybe I'm just old and stubborn, but I tend to find that what always worked - still always works. And that the new stuff that comes out is worth checking into, but it's not a safe bet to say that it's going to be better just because it's the next newest thing.