O.K. so shortly after selling my MK9 I started regretting the decision, so I ended up getting a new PM40 to use for C.C.. My biggest complaint with the MK was how much it weighs, I think the PM addresses that problem nicely. So now I am starting to think about C.C. ammo. Specifically I was wondering if there is any particular ammo that performs better in short barrels like the PM. Recoil also might be a concern, since this gun is so small and light. I currently plan on packing Golden Sabers in 180gr. but I am open to suggestions.