The Nosler Ballistic Tips tend to open fast, expand violently, and sometimes shed cores, all of which makes then DARN hard to beat for whitetails. The .30 150gr B-tips perform exactly the same way as the 7mm 140gr that I, my daughter, son, and about a 1/2 million other hunters use. I've NEVER seen a deer go out of sight to need tracking when hit correctly with 1.