There has been some discussion in other threads about bullet spin and the resulting performance or lack of. We all know which threads I'm talking about. It is impossible for me to comprehend the rotational velocity of a bullet but I have a hard time understanding how this rotation, or I should say the change of, can significantly change bullet performance. For the sake of argument we use a 10 twist barrel so, regardless of velocity, wouldn't the bullet only spin roughly 2 times if the chest of the animal is 20 inches wide? Or does the velocity shed that much faster than the RPM for this to be significant? The bullet still wouldn't spin that many times while in the animal if there is a pass through with much retained velocity. When I started shooting long range a couple of years ago it was obvious right away that bullet performance at low velocity and the resulting poor peformance was something I had never encountered. Over the last 15 years we have killed literally hundreds of buffalo with just about every bullet available between 30 cal. and 45 cal. and I've never seen what I would consider a catastrophic bullet failure unless something was hit before impact. These animals were all taken with many different RPM's but never further than probably 300 yards. I question if this is really as significant as it has been made out to be. Could somebody else shed a little light on this?