FWIW- I found this on Nosler's website:
CT Ballistic Silvertip
bullets are aerodynamically efficient, impact extruded, boattail designs made expressly to maximize long-range bullet stability and accuracy. In varmint weights they are constructed for instantaneous, violent expansion on varmints. In hunting weights, jackets have been thickened and cores hardened to blend generous expansion with judicious penetration-ideal for light and medium game at extended ranges.
"Judicious Penetration?"