It's elemental, actually. A PT is made for the tip to expand and the base is made to hold together and give deep penetration. An AB is made to explode. The plastic tip is driven down the center of the lead and forces it apart. It opens up much faster than a PT.
No sir, it's not.
If I understand Nosler's statement on their NAB, they were designed to have terminal performance much like the NPT, but with a sleeker shape, better B.C.'s for LR shooting.
And, when JG speaks about NAB's, listen. It's not theory...
