Years ago when I shot 150gr Interbonds out of a 308, I had the same experience of penciling. All inside 100yds, little to nowhere blood trial. Found them all piled up within 100yds but had to hunt for a few. Swapped to 150 NBTS and SSTs and never had that problem again.
That's Hornady for you. If you had bought a lot from a different production run you'd probably have got textbook perfect expansion. That said, the Interbond is a tougher bullet than most any Nosler Ballistic Tip.
