I have taken many Elk over the years. Early on we used to shoot Noslers with problems. Shot great on paper but tracked many animals after they had been shot. The next bullet we went to is the Barnes x. This bullet did well but was a pain to get copper out of the barrel. The next bullet was the triple shok from Barnes, this is an excellent hunting bullet if someone is planning on 500 yes or less. We had great success. We started hunting long range about 5 years ago and have used jlk 168 / 180 bullets and Berger 168 / 180's in our 7mms. They have been really good. It does require making a good shot of course for the bullet to do its job. I just had a custom .300 rum built & I am running 185 Bergers @ 3407 fps. I will report back on the findings. Shooting steel @ 500 yds with the .270 , 7mm and .300 rum it is very clear how much more energy the .300 rum has. I had no problems killing elk with the .270 or 7mm, just thought if I had an encounter with a bear the rum may be a better way to go. A question all of us have to ask ourselves when strictly selecting a bullet or even caliber is how far do we intend to comfortably shoot an animal? The second question is how dead is dead? A 6x284 with a 105 Berger has claimed the life of many elk. One of them happened to be @ 1115 yds by a friend I know. He is an ace marksman and killed a 337 inch bull. I do not recommend this be tried just giving an example. Good luck.gun)