Months ago, I posted one article about the history of the longbow, and I mentioned knights pinned to their horses through their armor plate and stories of arrows going through four inches of oak.
Those feats were possible not only because of the power of those bows, between 120 to 180lb, but also because of the design of the points. The archers had at the time specialized points in their bows called Bodkin points.
This was the .50 cal. Barrett rifle of those times. These where their armor-piercing rounds at that time.
I was lucky that one SCA (Society of Creative Anachronism) member at the range, had a couple arrows with bodkin points that he let me photograph.