I have a couple 686's, both are 4 Inch however.
While not a 686, this is a 3 Inch GP100, and is the same gun from a CC point of view. It has Pachmayr ComPac grips. The Holster is a Rocky Hill Pancake with inner Hammer Shield. I see no reason to Bob the Hammer.
I have a 3 Inch 66-2 DAO with a factory bobbed hammer as well as a 64-6 Snub that is also a factory DAO with bobbed hammer. I like the bobbed hammers just fine. However I rotate through several revolvers during the year, and I have never had an issue with a Hammer snagging on anything.
The Speed loader is a Safariland Comp III.
The Speed Loader Carrier is a Big Creek Kydex in Carbon Fiber print.
You can conceal carry a 3 Inch 686 or GP100 wearing the right cover garments. I have a Duluth Trading Company "Working Man's Vest" for warmer days. I have the Iron Range for cooler weather. Get a Tall if offered for extra Length. I have a Carhart Jac Shirt in a Tall. I also have a Blue Denim Carhart western shirt one size larger than I need, that I also wear as a Jac Shirt.
I also have a closet full of Fishing Shirts for warmer weather.
When buying clothing look for garments that will cover the revolver.
I wear the Working Man's Vest the most. It is light weight, and cool enough to wear most of the time here in Missouri.
A Tip, get a couple Speed Strips, and carry one in each Patch Pocket. This weights the bottom of the vest so that it sweeps back during the draw. If you are going to weight the vest, ammo is as good as anything to weight it with. I also carry either 1 or 2 Speed Loaders in a Big Creek Carrier on the belt.
If you are looking to buy, consider a Model 60 or SP101 and also the K Snubs. I have a 2.25 SP101 as well as a 3 Inch SP101.
I also have a 2" 64-6, a 2 Inch Model 15 Combat Masterpiece, a 2" Model 10, a 3 Inch 66, and a 2.75" 315Night Guard.
I carry the 2 Inch 64, and 2.25" SP101 the most. They conceal well, and are lighter weight than an L Frame or GP100.
I have been rotating between my 3" GP100, 2" 64, and 2" SP101 the last couple weeks. I notice the difference in weight when carrying the GP100, and it is a little lighter weight than a 686 in a 3 Inch.
Just My 2 Cents
Bob