This page was first published online 6-6-2011
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There are 3 videos below that illustrate nosedive during feeding of single stack 1911 pistols. It happens with all calibers examined (45 ACP, 10mm, 40 S&W, 9X23, 38 Super, 9mm) and occurs when the round count in the magazine is sufficient to produce a gap between the top round and the one under it. The larger the gap, the greater the nosedive.

For all the videos shown below the gun is held in a Ransom Rest during live fire. Video acquired during controlled lab conditions with the slide released from slide lock or when cycled by hand (slingshot) show the same nosedive phenomenon.

Videos:

#1 - 45 ACP

#2 - 38 Super

#3 - 9mm

If you missed the video when it first played, double click on it after it has finished playing and it will run again.

#1 - 45 ACP

This slow-motion video below illustrates nosedive as a 45 ACP round is being stripped from the magazine of a single stack 1911 pistol during firing. The feeding of two rounds is shown. The first is round 7 (there are 7 rounds in the magazine). This round dips about 9 degrees as it is pushed forward by the slide and before it hits the feed ramp. The second example is round 3 (there are 3 rounds in the magazine). It shows no appreciable change in angle as it is pushed forward by the slide.

#2 - 38 Super

This slow-motion video below illustrates nosedive in a 38 Super 1911 pistol during firing. The video shows round 9 (there are 9 rounds in the magazine). This round dips about 8 degrees as it is pushed forward by the slide and before it hits the feed ramp.

#3 - 9mm

This slow-motion video below illustrates nosedive in a 9mm single stack 1911 pistol during firing. The video shows round 6 (there are 6 rounds in the magazine). This round dips about 8 degrees as it is pushed forward by the slide and before it hits the feed ramp.

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