My former agency recently dropped the 40 for the 9. We went to the 40 decades ago because the 9 didn't do it's job in a couple of OIC's. We experienced one shot stops in 6 subsequent shootings but our new Sheriff is from another county and they use the 9. Don't know their stats and we have few shootings. My question is, how are the new 9mm rounds doing for us on the street?