Shot a mature whitetail buck (still only about 140 lbs dressed around here) last season with a 150 gr IB goin ahbout 2900 from a 30-06. It hit low in the chest right behind the shoulder and passed right through with a fairly large exit wound. When we skinned him there was massive damage and trauma around where the bullet went through, but no little peices of lead or jacket, which indicates to me that the bullet expanded significantly even though it didnt hit any tought or thick bone or pass through a thick part of the deer, but didn't come apart. It didnt knock him down and he jumped out of the feeder pen appearing to be fine but there was very easily followed sprays of blood all the way to him about 50 yards. I think had i hit him higher in the shoulder he would have gone down in the pen. This is my only experience with them and i think a nonpremium bullet would have done just as well, but i think this is a good choice for tougher game of shots at angles where nonpremium bullets might not penetrate enough. I personally prefer a bullet that will reliably go through, so even if he doesnt go down i will have a good blood trail to find him with, and i think this one does that while expanding enough to cause alot of damage. Accuracy with this bullet was as good in this rifle as any other i guess, its just a factory rem 700 bdl sporter. They also have high BCs. I personally quit using them b/c i got a 270 wsm and am now shooting a 130 grain bullet at 3300 fps and think i can get away without spending the money for premium bullets to kill whitetails. If youre interested in the IB, also check out the swift sirocco and nosler sccubond, both boat tail plastic pits with bonded cores like the IB.
