I agree it would be safe as long as no reference to all of the USG/IOM /Fiveseven handguns........ The PS-90 is designated a rifle that is fine and good but it would be unlawful to load/fire or intened to use any of these typs of ammo in a handgun...!
The ss109 is not the ss190 I dont think it matters only when it falls in to the handgun topic there both .224 dia steel core but this is a little gray since Its sale to civilians is restricted but the older ones fall into a Grandfather clause but like I said its gray...except the part of loading/carrying in a Handgun That is unlawful....