After that they will just pencil through or whatever you want to call it. There is a 6mm hole all the way through but it will kill them if you hit them right. I killed one at 1007 yards and it went through the front shoulder at an angle but still only left a 6mm hole even in the bone.
A caliber hole though bone doesn't indicate non-expansion, I have seen the same thing on Moose with a 250 grain Partition shot under 100 yards and the recovered bullet was mushroomed nicely. Only a recovered bullet will reveal the truth