This last year I switched from the original Barnes X bullet to the Tripple Shock. I was having some problems with copper build up in my barrel thought these would help with that and they have. I killed a nice 340 bull with a 180 gr TSX from my 300 RUM. However when I quartered and boned out the elk I was surprized to find the bullet in the off shoulder. Normally with the old Barnes X they always seemed to go all the way through. The recovered bullet looked like a FMJ with all the petals gone it was barely larger than .30 caliber. I haven't weighed it yet but I believe it lost quite a bit. I hit the elk just behind the shoulder about 10 inches below the backbone angeling forward. The shot was from 217 yards. I shot the elk a second time as he ran off and hit him right in the front shoulder low the bullet penetrated to the heart and it lodged against the off side shoulder. It looked like the 1st bullet. I lost it somehow so I can't weigh it. Im use to complete pass throughs and was a little disappointed with the performance. I load these pretty hot but haven't chronographed them yet. But with my gun zero at 200 I'm only 4 inches low at 300 so they must be steaming along fairly quickly. Anybody elsed used the Tripple Shock Bullets on Elk yet? And if so what were your results?