I just started breaking in a new 1911, and only have about 150 round through it. I have noticed that every now and then when I hit the slide release, the hammer drops forward to a partially cocked position. It has never happened at the range, it just seems to be after cleaning when the gun is pointed straight in the air. It may happen 1 out of every 10 times when held in this position.

Any of the 1911 experts out there have any idea why this may be happening?

Thanks