Lorica Hamata being pierced by arrows

[Walhaz]

I also think that the sheer volume of hits would be a factor, as well. Modern bulletproof vests are really only designed to withstand one or two hits (although they often can stand up to more) after which the plates and Kevlar need to be replaced. In the article Nathan Ross referenced the 70 pound bows regularly broke links at 20 yards. How many links need to be broken before the "shower of arrows" reported at Carrhae might hit those broken links again, and pierce the armor? Essentially, by breaking links the steady stream of arrows is degrading the hamata. Eventually, the armor will reach the point where links previously broken by arrow fire will no longer be able to reduce the pressure of subsequent arrows, thereby allowing arrow penetration of the armor. Over the course of an entire day, given enough missile fire (such as that reported at Carrhae), many legionaries' mail armor may have been degraded to the point where it was no longer arrow-proof.