I myself have killed 9 elk with the 180gr ballistic tip out of my 300 ultramags.What most people are unaware of is that some of the ballistic tips like this particular one,have been redesigned several times.The current version has a jacket about twice as thick as earlier versions.I use lung shots although I have occaisionaly hit shoulders and have witnessed the 180gr ballistic tip passing through both shoulders of a mature elk.That being said,I was so impressed with the tsx,that I now use them exclusively for all of my elk and moose hunting.