I shoot 200gr eldx factory loads in my 300bee. I wish I could tell you what they do when they hit an elk, but I haven't had a chance to test them yet. I have zero terminal ballistic data on this load. I have however killed whitetail with the eldx in about 5 other cartridges, and unlike some folks, it has done exactly what it should each of the 20+ times I've killed with it. The out of the box accuracy of that ammo has been impressive in every rifle I've shot it in. I have a mark V arroyo, and with those factory loads I can hang just under 1moa, probably somewhere near .8 or .9 which suits me just fine..