Please excuse the HORRIBLE pics.....I'll get some natural light pics soon, but for now.....
Pachmayr Pro Compac: Yes, they are ugly....but these are my all-time favorite for "combat" shooting/defensive carry.
They leave the backstrap exposed and extend just a tad below the grip frame. They allow for a full firing grip (vs pinky tucked under for boot grip) and NO finger grooves means that I can obtain a firing grip in a hurry, without my fingers needing to find the grooves.
The Pachs also have NO palm swell, making for a very thin profile (and a "forgiving" grip that allows for obtaining a hurried firing grip)
So, ugly yes. Quick into action and low profile=my favorite carry grip.
Next are the Hogue Bantam boot grip (Rosewood)
These are well fit, handsome, and allow for snag-free carry under cover garment.
These grips have a well designed palm swell, and fill the hand nicely.
They too have an open backstrap for lower profile, and come nearly flush with the bottom of the grip frame (again, nice low profile).
My hand/fingers DO fit the finger groove naturally, and I can either squeeze all my fingers onto the grip OR tuck my pinkie under the grip. (I prefer pinkie under.....otherwise my pinkie tends to fall off under recoil, causing me to reacquire a full firing grip)
Both grips are great, but boy does this 686 point naturally with the Pachs installed!
If you compare both sets in my pics, you'll notice that the Pachs allow for a much "higher" firing grip, as the grip profile is contoured higher up behind the trigger guard.