Extreme high rise configuration may not work well with a 4" revolver. It's hard to draw in the limited space under your arm, and the butt may not be well supported against your side for concealment. The P6-DA does not look as "high rise" as their advertisements would suggest.

I am very pleased with my Alessi CQC holster for a 686-6 4". I was pleased to find that the leather reinforcing band at the mouth is cut to extend upwards, covering the sights and hammer. This was not obvious from the illustrations, and will go a long way to protect your jacket from wear. A thumb-sized section is molded outward to clear the cylinder for one-handed reholstering. Overall, it is well thought out and constructed with the finest materials. It is invisible under a jacket, as long as the muzzle is covered.