THE BEST SIDE OF WHAT ARE THE SAFETY RULES FOR USING FIREARMS IN SELF-DEFENSE?

Specially with the slide firing pin safety, you are able to confidently put the hammer down with it on instead of stress about dropping the hammer. Then slide it off and its as safe for a DAO with a safety IMOI seasoned no FTFs, no mis-fires and no FTEs. I'm going to attempt to follow the mfgr's advice to utilize regular velocity. Is there a cause