Mike
Maybe it is just that sometimes bullets do strange things.

ie. bullets behaving badly.

That is what I used to think.

And sometimes that must happen.

However...

After having 3 Safaris videoed.

Now I have a new answer, not a theory, but an actual proven reason, why "things sometimes do not go as they should".

It is very simple actually, but I would not have beleived how it happened, except it was filmed, and could be played back in slow motion.

Simply stated the animal is moving before the bullet strikes him.

Several of the animals I shot moved before the bullet impacted them. I as the hunter aiming at them, sometimes with a scope, did not detect this movement.

Just think how a slight difference in the animals position to the shooter can change the bullet impact location and thus its path.

So it may not be the bullet turning, but the animal moving before impact.

It is on my videos several times.

It seems Zebra are especially "good at it".

In fact I do not recommend that you shoot at a Zebra facing and looking at you.

They have the "Matrix" move down pretty good.