For starters, Critical Duty was optimized to fire from a 4-4 1/2" barrel (such as a duty weapon). You're shorting yourself by carrying it in such a small firearm. Burn rates are a thing. Speer has an HST load specifically developed for short barreled autos that you would probably be interested in. You will most likely see less recoil changing to ammunition suited for such a small gun. As far as ports go, you likely won't see a huge advantage since the barrel length is so short and the ports are tiny.