I'm having an issue with my 686-6. This morning I put maybe 30 rounds through it. All Norma factory ammo. At least five times, after firing a shot, I could not draw the hammer back, pull the trigger, or open the cylinder. It was like it was fused shut unless I jiggled the action a bit, at which time it operated again. This happened on all three of my last shots. Any ideas? It's going back to Smith and Wesson on Tuesday for a warranty repair but I'm also curious what the issue might be.