I don't understand the "penciling through" I've killed 30 deer with accubonds, they don't expand like a cup/core bullet but they do expand, in the pic below the .284, 160 gr accubond impacted the deer at just about 2400 fps, and you can see the exit hole, any faster than that and you should get the same results, I've had some expansion at 1600 fps impact velocities, every accubond except one has left an exit like this, ranges were from 307 to 1350 yards, so on average shots expansion will be adequate, the deer below was shot at 702 yards.