I wouldnt say its a Perfectly valid reason. It is a reason. It's kinda like having a check engine light on a model X car and never buying a car again.

That being said my model 28 will usually set off 2 or 3 out of 6 on the first try. Have yet to shoot a full 6 rounds. My former model 12 would bind and not allow rotation of the cylinder on 2 out of 6. Trigger would stop half way. If I let go and pulled again I could usually force it shoot.