325gr 45LC bullet @ 1300 fps @ 15 yds. The vest held.
Actually Second Chance is the about the only manufacturer that is admitting that Zylon is failing after exposure to humidity and general wear. American Body Armor makes a Zylon vest that has to have the same short comings (since the short coming is due to the Zylon itself) but they are unwilling to admit it or attempt to rectify it. At least Second Chance is doing something.Second Chance is being sued because they made the body armor with Zylon, which they knew was not suitable for use in body armor. The manufacturer of Zylon did not recommend that application for the product.
I've got an old mid 80's flak jacket that I've shot with 9mm and 357.mag and it stopped them cold. I dont' know what would happen if it were being worn at the time. I know better than to try rifle rounds.
One has to be careful with drawing conclusions with these type of tests. What the flak jacket is draped over and the object's resiliancy or resistance to deforming under blows has an effect on how the jacket resists bullets.