I recently obtained part of a slightly used Interceptor Body Armor vest, along with a "Trauma pack" and thought it would be interesting to test out the 7.62x25 Tokarev round.
I don't know the details of the construction of the vest or the trauma pack, but the vest appears to have a yellow Kevlar like material inside and the trauma pack has a tightly packed white material that might also be Kevlar. I welcome any additional information about what the materials/construction might be.
The target - vest with trauma pack
Front
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/InterceptorBodyArmor.jpg
Back
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/InterceptorBodyArmorBackjpg.jpg
The pistol and ammo - Romanian TT33C, 1980's Romanian surplus ammo
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/RomanianGoodness.jpg
The vest insert alone was able to stop a 124gr. FMJ 9mm Luger round. The 7.62x25 round went right through the vest, through a 1/2" thick fiber reinforced rubber mat, and deep into the dirt backstop.
front
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/3Enter.jpg
back
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/2Exit.jpg
The 7.62x25 rounds also went through the trauma pack, through the vest, through a 1/2" thick fiber reinforced rubber mat, and deep into the dirt backstop! It could be that the trauma pack's ability to stop these rounds was compromised by the 5.7x28 rounds (polymer tipped, lead core) that were fired into it previously. The trauma pack was able to stop all of the 5.7x28 rounds, however.
front
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/tramaPackEntry.jpg
The paths of the 7.62x25 Tokarev bullets were deflected substantially by the trauma pack but they still managed penetrate everything.
back of vest behind trauma pack
http://i89.photobucket.com/albums/k239/jjjxlr8/TT33/InterceptorVestTest/tramaPackExit.jpg
Please note that the vest insert was manufactured in 2001 and may not be a "serviceable" vest. This was not an attempt to 'test' Interceptor brand Body armor.