I have read many a thread on the sear and i think the repeated violent shooting and cycling is probably the hardest abuse you can do to a pistol. Think about the act of firing the gun then it cycles fast and hard.
Yes the half cock was put in place so the rider would not accidentally shoot his horse or so the story goes. The half notch is pretty small in comparison to the full cock. I could not find any info on sear failures that resulted in a shooting from the half cock but i am sure its happened. I would think if the sear failed you would notice the issues quickly? Maybe?
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