I have both and have to choose one for my off duty. I have been using the Kahr PM9 for the last few years and its a great little gun. I recently picked up a Ruger LCR 38 spl+p and I have to say I love this gun. I can only qualify with one and I can't decide. The kahr has both a 6 & 7 rd mag and the LCR holds only 5. So that's one point for the kahr. The LCR is 2 oz lighter  (loaded) so that's a point for the Ruger. I like the idea of the revolver for a CCW, it's like those old Kodak Camera ads, just point and click. If you have a FTF, just pull the trigger again. So if you had to choose one which would you pick?

Which do you shoot better?

Which do you shoot better?

^^^This.

 

Also look at your reload times. How fast can you put 7 fresh ones into your Kahr vs how fast you can plug 5 into your LCR. Additionally, which is it easier to carry reloads for?

 

I carry a Kahr PM9 as a BUG off duty and as a second BUG on duty.