Alright cjcj,
I'll tell you why I think the barnes X are crap.
For starters, they're much longer for weight than a standard lead-core bullets. This causes some problems for loading, in particular in short cases and cases with short necks. Like the 308, 30/06, 338, 300 winchester, 264, etc. etc. etc.
To compensate for that, most people dropped to a lighter bullet weight. In my opinion sacrificing bullet weight to accomadate seating depth of a bullet is a big mistake.
Another thing I noticed right off is they were a pain in the ass to work up a load for. I tried a variety of powders and load combinations and found a couple loads that were marginally accurate. They arent nearly as easy to work a load for than nosler partitions.
As to how they perform on game. I personally saw 2 experiences that iced the cake for me on barnes X. One was my best friends unlimited ram he killed in Montana with a 264 and barnes X bullets. He shot the ram through the lungs with his first shot, but the bullet failed to expand, despite the fact the bullet was traveling in excess of 3000 fps. The initial shot was 200 yards or so. He hit the ram again when it stopped about 150 yards from the initial hit. The ram was quartering away very hard and he hit in the hip, broke the hip, traveled through the ram and he found the bullet under the skin on the off-side. The only "expansion" on that bullet was a very small, less than diameter petalling at the very tip of that X bullet. The bullet was bent slightly but if not for that fact, you could nearly relaod that bullet again. He was extremely lucky those X bullets didnt screw him out of this ram. If he hadnt hit that ram again and busted the hip, it would have went a long assed way with only a 264 pin-hole through it. With little to no blood on dry ground and a ram in heavy timber, it would have been extremely difficult, if not impossible to find that ram. The initial hit showed a 264 caliber hole going in and out of that ram, busting 3 ribs.
The other time I saw X's in action was out of a 300 winchester. A whitetail buck shot in a pasture at 40 yards, middle of the body tight behind the shoulder perfect broadside shot. The same exact performance as with my buddies ram. 30 caliber hole in, 30 caliber hole out. The buck ran over 600 yards before bedding down. There was no blood trail despite there being 4-5 inches of snow on the ground. The buck had to be shot again.
Thats not the kind of performance I'm looking for in a bullet.
Nosler partitions for me, perfect combination of expansion and penetrating abilities. Large wound channels with CONSISTANT results, very boring, but very effective.
Good luck with your X bullets, but I'm not going to try them again. I dont like surprises from trick bullets.
Maybe if you spent some time at the range you could become a better shot.. hump . plus try your gun with different bullet typs [ they all fly a little different] 
