I also carry the s&w 340 pd. Its essentialy a snub nose revolver made of a lite weight material similar to titanium. I have thought about using 2-4 pound fishing line and the lanyard ring to wear the gun "like a neckless." When the gun is needed just grab and pull. The line is strong enough to carry the gun but weak enough to snap when yanked on. But...I think it would swing too much and bug me. Maybe two lines….

Another thought was a camera case. The kind you see the tourists with around their neck. It could be attached to the shoulder straps so no swinging. Itd be very inconspicious and not "scream" gun. It would also be right in front for quick access. But would be a few more ounces of weight.

Right now I just slip it into my right front pocket (in a pocket holster) and the 10 reloads in the front left. It works. But it’s no .44

In the past I just strapped a cheap nylon holster onto the pack belt. This was for a 4” revolver. Worked great! Cheap and lite !