I bought a Second Chance level 2a vest back in 1990. I wore it for 6 years every day on the job until the department started issuing them. In 2003 my niece did a term paper/science project on ballistic vests. We shot my old vest with a 44 magnum, a 357 magnum, 9mm, 30 tokarev and a 38 special. For the revolvers I shot it with a lead swc and a jhp for comparison. The 9mm I fired a jhp and a NATO load. The tok used FMJ only. My vest was well worn by then, having been alternately soaked in sweat and dried every day I wore it. It was frayed at the edges. I wrapped the vest around a large bundle of newspaper, the size of a man's chest. Because of the number of shots, I shot both the front and the back trying to keep the shots as far apart as possible. I can say this...The vest still stopped all the rounds it was rated for. The 44 mag did a lot of damage to the tightly wound newsprint that amazed all of us. Only 2 rounds of the group of shots from the various guns penetrated. The 9mm NATO penetrated the front of the vest and lodged in the paper an inch or so in. The 30 Tokarev easily pierced the front of the vest, the newsprint and lodged in the back panel as I recall. The vest was not rated for th3 NATO load or the Tokarev. Pretty good for a 23 year old vest that was heavily used. My niece got an A on the project.