Pretty sure that's for their IB bullet, which is incorrect anyways.
Hornady published an errata correction to that data: https://press.hornady.com/assets/pct...1522702177.pdf
Page 382, 300 Whisper/AAC Blackout – 150-155gr C.O.L.’s should read: GMX-1.962”, InterBond-2.210”,SST-2.210”, FMJ-BT-2.090”, Interlock RN-1.900”, InterLock SP & BTSP-2.106”, A-MAX-2.110”