I think of them as sort of the best of both worlds. They expand sufficiently, yet the rear core penetrates on through.
For what they are though, Nosler has priced them beyond what I'm willing to pay. I pick some up here and there, but have been just as pleased with other designs.
I view "premium" bullets like premium gas. You may get slightly better performance, but you'll still get there, and maybe have a dollar left in your pocket.
