Winchester super X positive Epanding point it is like a hollow point with little slices at the edge of the hollow point to make it open up faster i guess. on the box it says for thin skin,light muscle and bone , ideal for game such as antelope,mule deer, whitetail deer and black bear,it says rapid controlled expansion, i was just wondering if any u guys have tried these of deer i have a rifle that likes them pretty well its a 25-06 they are 120gr, and i dont want to shoot them if they open up to fast like they look like they might and not get good penatration