Seems Berger's have serious problems with tips opening, especially at LR speeds. They usually tumble. I watched video of gunwerks killed elk at 900yds. They recovered bullet and it looked like a banana. They said that's how the Berger's usually work and that a tumbling bullet is very deadly??? However in videos the bullet often doesn't tumble until 10" mark or so and that's all most out of a deer size animal! So putting a pencil through one lung and if lucky you get a tumble in second lung...seems like people shouldn't WANT THAT? Look at this video...Tips even at high speed do not open often it just tears tip off and then bullet self-destructs, often showing signs of tumbling with the curved pieces. If it did that every time I guess it would be very deadly, but the times it doesn't is very often in many ballistic gel tests. And every body and there grandma is doing ballistic test now a days.