Teeder,
AccuBonds tend to open a little wider than Partitions, but not all that much. The last AB I recovered was the only one found inside a deer, if I recall correctly, and overall I've seen fewer than 20% stay inside any animal. The bullet was a 150 from a .308 Winchester, and the deer a Montana whitetail doe at around 70 yards, facing me almost directly. The bullet hit the inside of the left shoulder and was recovered from under the skin on the right ham, retaining 70.5% of its weight.
