Ballistic Info

NIJ 0101.06 BODY ARMOR CLASSIFICATION Personal body armor covered by this standard is classified into five types (IIA, II, IIIA, III, IV) by level of ballistic performance. In addition, a special test class is defined to allow armor to be validated against threats that may not be covered by the five standard classes. 
Type IIA (9 mm; .40 S&W) Type IIA armor shall be tested with 9 mm Full Metal Jacketed Round Nose (FMJ RN) bullets with a specified mass of 124 gr and a velocity of 1225 ft/s ± 30 ft/s and with .40 S&W Full Metal Jacketed (FMJ) bullets with a specified mass of 180 gr and a velocity of 1155 ft/s ± 30 ft/s.
Type II (9 mm; .357 Magnum) Type II armor shall be tested with 9 mm FMJ RN bullets with a specified mass of 124 gr and a velocity of 1305 ft/s ± 30 ft/s and with .357 Magnum Jacketed Soft Point (JSP) bullets with a specified mass of 158 gr and a velocity of 1430 ft/s ± 30 ft/s.
Type IIIA (.357 Sig and .44 Magnum) IIIA armor shall be tested with .357 SIG FMJ Flat Nose (FN) bullets with a specified mass of 125 gr and a velocity of 1470 ft/s ± 30 ft/s  and with .44 Magnum Semi Jacketed Hollow Point (SJHP) bullets with a specified mass of 240 gr and a velocity of 1430 ft/s ± 30 ft/s.
Type III (Rifles) Type III hard armor or plate inserts shall be tested with 7.62 mm FMJ, steel jacketed bullets (U.S. Military designation M80) with a specified mass of 147 gr and a velocity of 2780 ft/s ± 30 ft/s.         **All of our Level 3 Rifle Plates are also tested to stop the 7.62 x 39 mm Ball and 5.56 x 45 mm M193.  - Not rated to stop the 5.56 x 45 mm M855
Type IV (Armor Piercing Rifle) Type IV hard armor or plate inserts shall be tested with .30 caliber armor piercing (AP) bullets (U.S. Military designation M2 AP) with a specified mass of 166 gr and a velocity of 2880 ft/s ± 30 ft/s.
Special Type A purchaser having a special requirement for a level of protection other than one of the above standard types and threat levels should specify the exact test round(s) and reference measurement velocities to be used and indicate that this standard shall govern all other aspects. Guidance on common special type threats and the appropriate threat velocities is provided in appendix B, along with a methodology for determining the correct reference velocity for other threats.
More Info Can Be Found Here: https://www.ncjrs.gov/pdffiles1/nij/223054.pdf