Thanks for the work on this project. You may have changed my mind on some things. I've been a .264 Mag guy for about 25 22 years now, but my experience with partitions before picking up the .264 were not good. From the pictures you have posted I can see the long shank of the 125 and 140 grain partitions leaves a lot of room to create a mushroom. On the the 150 grain 30 caliber partitions I had used in the past my results looked nothing like your pictures, but rather, that small base of the bullet was pretty much all that was left. I am also very impressed by the uniformity of the the TSX bullets. Every one of them looks almost exactly the same. Thanks again for the work on this project; I think I'll try some partitions of some TSX now!