As I stated in another thread the IB's seem to have a larger frontal diameter and retain around 80% of their weight from the bullets I have recovered. All but one have been DRT with the IB. The AB's however seem to be less finicky as for accuracy. The 8pt I killed with the 257 Roy and 110 AB did not impress me with the exit which was about the size of a dime and went through both shoulders and he still made it 60yds. Others that I have talked with have said in their .308 calibers that the AB's exit holes were around the size of nickels to quarters depending on the distance. Most of my IB exits have ranged from quarter sized to golf ball. If my gun shot both the same I would shoot the IB's.
