This is a topic I’ve touched on quite a bit in the past. As a devout follower of the Church of the Wheel, I also must recognize that my sad devotion to that ancient religion doesn’t magically make my guns any less vulnerable to failure. Here’s a video on an interesting failure to fire that I had with my GP100:
Obviously, this was an ammo issue, and not a gun issue. The interesting side note to this is that if my guns had hammer spurs, I’d be able to check for this issue in the future by pulling the hammer back slightly while keeping my finger out of the trigger guard and spinning the cylinder.