The Barnes TTX tipped bullet expands and causes extensive internal damage. Exit hole is normally kinda small, mainly because of petal edges are sharp. I have used them on over 80 animals including two trips to RSA. Only two have ever been recovered, one from a frontal spine shot on a Cape buffalo and one from a boar that went full length and was found in boar hock.
If the animal does not drop on the spot it will take a few extra yds for the blood trail to start, but you will get your animal. These bullets do work very well. If the op needs a large exit wound than go to an Interlock.