The majority of PDs that issued the 147 reported a vast majority of "one shot stops", of course thats provided the shooter does his job. San Diego PD used the 147 for years and were extremely pleased with it. I carry the new Winchester PDX1 in 147 in all my 9mms. Years ago the thought was that since it is a "subsonic" round it wasn't worth the room it took up but that theory was proven wrong.