Just a quick video I found about M193 and its capability of punching through armor at close range. Some quick thoughts: Projectiles all have their quirks, and just because M193 penetrates AR500 armor doesn’t mean it works well against other armor, namely ceramic. Supposedly Xm855 with its steel perpetrator will fail to penetrate the AR500, but it will penetrate HDPE based panels where as M193 cannot. Physics is a strange mistress.
The New Rifleman
In pursuit of practical marksmanship.