I just used the saf-t-trainers (dummy rounds) in my 19 and it didn't feel right. You can feel the resistance when the firing pin strikes the flat primer area. When I used the snap cap in my 27 it felt like a normal dry fire. I don't know the brand of snap cap. A friend of mine just gave me a 3 or 4 rounds. They just say 40S&W with a *-*. dunno? Anyway, is it safe to use the dummy rounds in my 19 or should I invest in some real "snap caps"? Thanks.