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1911 ejection pattern

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1911 ejection pattern Empty 1911 ejection pattern

Post by Slamfire 2/5/2021, 9:09 pm

How do you get a 1911 to eject at 3 O'C?

I recently converted some old iron sighted 1911's to optical class, with Ultradot's. The things eject rounds over my right shoulder, which was OK for the time. However, knowing that Bullseye Shooters are brass kleptomaniacs, lol!   and that picking up brass takes too much time, how do I adjust the things to kick brass out at 3 OC?

I looked at the ejector of my Les Baer and noticed it is square faced and the bevel is at the bottom. That pistol is also running a 12 pound recoil spring.


1911 ejection pattern 0SwbrvU

The ejector faces on my converted 1911's are tapered top down, and on the side. I am certain this has an affect on where the ejector hits the case head, and therefore the direction of ejection. I don't know how to measure extractor tension other to say, there is tension.

The converted 1911's have the standard 16 to 18 pound recoil spring, and until all my hard ball is gone, I would like to keep those springs in the guns. But, if I want to shoot them in a Bullseye match, what do I have to do to get them to eject into my net?

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Post by jglenn21 2/5/2021, 10:10 pm

I use a dead flat nose on my electors then lower the slide election port to a maximim of .470 measured from the bottom of the slide to the bottom of the port. Been know to go lower. After milling it lower, taper the bottom inside edge. Lowering the port is the key for me
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Post by jglenn21 2/6/2021, 5:43 am

Extractor tension also plays a part. Check a wilson combat video on extractor tuning for one method of testing
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Post by Steve in Allentown 2/6/2021, 9:04 am

Slamfire wrote:How do you get a 1911 to eject at 3 O'C?
Like jglenn I've had good success with perfectly flat nosed ejectors combined with lowered ejection ports.  Depending on a number of other dimensional factors this may not always be the case but it's a good starting point.

Extractor tension is part of the equation but so are its geometry and very importantly, its deflection.  For more details than you ever wanted to know go to this LINK.
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Post by tyro 2/6/2021, 4:37 pm

wow great info in that link steve.my caspien 1911 ejects brass straight back to my hat,i will have to read complete article. thanks tyro

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Post by Slamfire 2/6/2021, 6:11 pm

Thanks for the replies.

Measured  my Les Baer Wadcutter ejection port, from bottom rail, to top port, 0.490"

My early 90's Springfield Armory NM, it was 0.520 ish.

My Colt MKIV Government model, 0.570"

Somewhere I read a thread on ejection patterns and where the ejector hit the case head. I think it was by Steve in Allentown. His write ups are outstanding.

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Post by Jon Eulette 2/6/2021, 6:41 pm

Ton of factors contribute to ejection pattern. Recoil spring weight, ejector length, ejection port height, load, optic, grip/stance and extractor tension. I would try different recoil springs first and see if you can get them to eject in general location desired. Heavier charged loads will typically eject farther to the rear than softer loads; only so much you can do about that. Some trial and error involved.
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