1911 bending sear pins during dryfire!
I had the exact same problem in a new built Essex frame pistol. If you haven't solved your problem, here is what stopped mine. It turns out that the disconnector was not securely engaging the sear. When the trigger was pulled, the disconnector would slip under the sear, and drop the hammer to half cock instead of firing the gun. If the pin was hardened, it would break, if not it would bend. I replaced the disconnector, and the pin is still OK after 300+ rounds. Hope this helps!
Sandy
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