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SS190 Duty Round
The SS190 AP ball FMJ is designated as Armor Piercing (AP) ammunition, designed to penetrate body armor. Its sale to civilians is restricted. The SS190 bullet has a steel penetrator and an aluminum core. It is interesting to note that the SS109 FMJ bullet is essentially of the same design, except it uses a lead core with a steel penetrator. The SS109 is frequently found in civilian-legal M855 loads sold as surplus or contract-overrun ammunition. FN Herstal has stated that the SS190 round will easily penetrate protections that stop normal pistol rounds, but will not penetrate protections that stop the 5.56 x 45 mm NATO round such as Level III armor. The SS190 has demonstrated varying penetration depths of about 10 to 13 inches in gelatin testing by various agencies. The Royal Canadian Mounted Police Academy forensics laboratory tested SS190 fired out of a P90 into 10% ordnance gelatin, 10% gelatin covered with heavy clothing, and 10% gelatin covered with Level II soft armor. The average penetration depth in all test events was approximately 10.4 inches; the temporal wound cavity did not exceed 3.75 inches. Testing of the P90 done by Dr. Gary K. Roberts DDS showed an average of 12 inches penetration in 10% ballistic gelatin. Houston, TX SWAT has also done testing with similar results. Many have asserted that these figures are not deep enough, as the current FBI minimum penetration depth is 12 inches in 10% ballistic gelatin.