A old new hunting artifact like this ?

In 2004 when filming the first Big Viking movie from CChunter in Messina I picked up this perfect mushroomed BarnesX bullet. It is a 7mm bullet and as expanded perfectly. Seems that it did it's job and lay to rest not nose down or buried but perfecly layed open in the sand for display.

So what are the odds of finding a bullet like this where we know there was very limited hunting.