+1 to my friend TercGens comments. I own 3913s and 3914s and I find that they are rarely shot or carried any longer since I acquired the CS9.
The CS9 is, as TercGen pointed out, slightly smaller - lighter and shorter than a 39XX series gun. AND it Points better and handles quicker, for me, than a 39XX series gun. And of course a CS9 is a joy to carry. And slightly easier to conceal than a 39XX gun - especially when it wears TercGen grips!
Yes, you do lose one round with a CS9 vs a 39XX.......but having worked homicide investigations for 19 years, I am of the belief - based on experience, that you will be out of time long before you are out of ammo - no matter what you are carrying. Regardless of the.....stuff...you may read on gunboards.
7+1 147 grain JHPs works just fine, for me. My 0.02 Regards 18DAI