Hi benstt,
What would be the intended application of a 686?
I used to own a 4" 586. It was one heavy handgun. For bipedal self-defense, it was always loaded with the FBI load. I gave it to a very close and dear friend. I even paid to have it shipped to his FFL for transfer.
I consider the .357 Mag our most versatile handgun cartridge. For specific applications, there are superior cartridges.
I was never able to come close to advertised .357 Mag ballistics. The best I could pull off was ~1250 with 158 grain factory and hand loaded rounds.
Impressive .357 Mag ballistics were (allegedly) derived from 8.375" barrels. My guess is those velocities were inflated.
It's hard to beat the .357 Mag as a wilderness survival cartridge, not to be confused with a wilderness self-defense cartridge.
From experience, my model 586 was not a concealed carry handgun. It was far too heavy and inconvenient for concealed carry. Reloading a revolver takes at least twice as long as reloading a semi, and one is reloading only 6 rounds. Reloading a revolver at night and under stress is not easy. Also, one has to take his eyes off a threat to reload a revolver.
I do have affinity for revolvers. For self-defense, they can't compete with good quality semis. And don't believe the urban legend that revolvers are more reliable than semis. I've had at least three revolvers fail, and they were all catastrophic failures, meaning an armorer had to repair them. Fortunately, all failures occurred during training. I have knowledge of many more revolvers suffering catastrophic failure. I have never seen a good quality semi fail to do anything. And when a semi does fail, it's usually cleared and back in action within seconds.
My Sig P229 was by a huge margin the most reliable on-duty handgun I've carried. That handgun was flawless. Now, my urban self-defense handgun is a Springfield Armory EMP 3 9MM, and my wilderness self-defense handgun is a Springfield Armory TRP .45 ACP. Both have been 100% reliable and incredibly accurate.
I'm not attempting to talk you out of going with a 686. I own revolvers. I love beautiful revolvers. My intention is merely to stimulate thought about application of a 686.