spaniel
Expansion is good, but there is such a thing as too much of a good thing.
Exactly my thoughts about the expansion of the deep HP on the Barnes...
Reason for suggesting the Nosler is the expansion is limited to about 7/8" or there abouts and penetration continues, along with the cutting of the petals and the hydrostatic shock created by the large meplate of the bullet...
Example - this a .458/300 grain Nosler Partition PP - it shows the total expansion available, even though it lost a little 'lead weight' from the nose. The soft lead in the nose acts to start the expansion - something like the tip in a SST/SW.