Sectioning bullets doesn't tell you much. Like the hardness of the jacket, or the core.
<br> In the bonded core bullets, some of them, like the Throphy Bonded, portions of the jacket are hardend to slow down expansion.
<br> Then there is the bonding itself. Some, like the Speer Hot Core, really don't work. Others, like the Swift-A-Frame, get additional support by the rear section which bulges to support the wide mushroom of the bullet.
<br> I saw a few comments, not long ago, comparing the Barnes X to the Fail Safe. The guy thought the FS bullet would open at lower impact speeds due to it's larger opening. According to their manufactures, and some users, this isn't so. E
