Most of the time, I keep the Speer Short Barrel 200gr. Gold Dot load in my Mountain Guns, or the old Pro-Load "Tactical Lite" ammo, which is ballistically nearly identical, but flashier.

As to the 165 gr. loads, keep in mind that POI will be MUCH lower than with 240gr. loads, or even 200-grainers. Be prepared to raise your rear sight waaaaaay up.