Most of what I know about the e-tip I read on 24hourcampfire. I really want to give them a try but probably won't until next year, as I already have plenty of rounds loaded up and don't want to spend the money right now on more load development. I've had really good luck with the Barnes TSX in my 270 Win. but I'd rather give my support to Nosler if their bullets will shoot as good as the TSX does. The pure copper bullets are the way to go in my opinion, because they simply do not come apart, no matter how high the velocity or how much bone is hit. When I get around to it I will try the 150 grain e-tip in my 30-06. At just over 3000 feet per second, that combination will be ideal for anything from antelope to elk.