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1911Pro.com • View topic - Reliability....details, with PICS!!

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Joined: Thu Feb 24, 2011 2:21 pm
Posts: 263
Location: Mt. Home, Ar

Post Posted: Sat Nov 19, 2011 7:32 pm 
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I had a couple of pistols in the shop recently exhibiting the same problem. The breech faces were over-cut (too high). The cartridge, or more importantly, the empty could move so far up the breech face that the ejector had no shot at it.

Notice the position of the slide in relation to the grip in this next photo. The cartridge has passed over the ejector and is still in place. This is easy to check. With the slide off the frame (no barrel installed) push a round as far up the breech face as it will go. The extractor will (or should) hold it in place as you reinstall the slide on the frame. Push the slide back until the ejector is exposed. The cartridge should be knocked off the extractor as it passes the ejector.



Even in the best of circumstances, there is a remarkably small edge of brass exposed by the ejector slot in the slide for the ejector to strike. The yellow line in the ejector slot of the next photo will lead your eye to the edge of the case rim. It's easy to see there's virtually no way for the ejector to get a hit on it with the case in this position.



An over-cut breech face combined with a poorly fit (short and narrow) ejector is a malfunction (failure to eject) waiting to happen. The next photo shows a poorly fitting ejector piercing the breech face. Compare the ejector position in this photo to the amount of exposed brass in the photo above and you can see the wreck waiting to happen. The yellow lines indicate the area of concern.




Same area from the rear of the slide.






A failure to eject would be a random event and perhaps occur only once every few hundred rounds, but believe me, if it can happen, eventually it will happen. Chances are it will be passed off as “just one of those things,” but the condition is unacceptable to me and can be corrected. I view it as another step in the process of making a gun totally reliable, and that’s what our clients depend on and pay us for. Here are photos of a couple of ejectors I removed from customer guns. These look like they were DESIGNED to fail. The yellow lines point to edge bevels....that are in the worst possible place, the critical corner.

Government ejector, fit by a gorilla with a round file:



Commander:



The cure? Remachine the ejector slot in the slide moving it higher up the breech face AND closer to the center line. Fit a new ejector that will fill these these new dimensions. Here's one I just completed:



A brass smear on the top surface of your ejector after a malfunction is proof positive that you've just been bitten by this bug.

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Bob Rodgers
www.rodgerspistolsmithing.com


Last edited by Bob Rodgers on Mon Nov 21, 2011 2:17 pm, edited 1 time in total.
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Joined: Tue Feb 22, 2011 11:29 pm
Posts: 647
Location: Mass.

Post Posted: Sat Nov 19, 2011 8:27 pm 
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Bob: Excellent post and work. Thanks for sharing.

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Greg Derr
www.Derrprecision.com

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Joined: Sat Apr 23, 2011 4:14 am
Posts: 96
Location: Abbeville, SC

Post Posted: Sat Nov 19, 2011 8:42 pm 
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that is very good information. The breech face prep and firing pin hole chamfer are nice as well. Thank you. JT

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"Be true to yourself and be true to the craft. Now go sit down over a cup of coffee and meditate on that for a while". Jim Hoag 12/8/2011

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Joined: Sat Feb 19, 2011 8:38 pm
Posts: 1421
Location: SC

Post Posted: Sat Nov 19, 2011 8:58 pm 
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Excellent info Bob! Is there a source for the oversized ejectors (EGW?) or are they custom fabricated?

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Dave Berryhill

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Joined: Tue Mar 01, 2011 6:05 pm
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Location: East Tennessee

Post Posted: Sat Nov 19, 2011 9:30 pm 
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Great Info as always Bob!

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Joined: Mon Mar 14, 2011 1:39 am
Posts: 379

Post Posted: Sat Nov 19, 2011 10:48 pm 
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Thanks for taking the time to take pics,and post this!

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Piper Custom Gunsmithing
http://www.pipercustom.com/

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Joined: Wed Feb 23, 2011 12:11 am
Posts: 402

Post Posted: Sat Nov 19, 2011 11:29 pm 
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Barry Greyson contracted with EGW for a run of super-sized ejectors.
Bob and I are using these.
His e-mail:
bjg-1911@swbell.net

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Joined: Wed Feb 23, 2011 12:11 am
Posts: 402

Post Posted: Sat Nov 19, 2011 11:36 pm 
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I trust Bob will not mind me augmenting his post.

Here are some additional pics and methods.

Wilson mag will not lock in. Original ejector needs material removed from bottom. Also too short for reliable function.





New modified ejector. Has clearance. Length extended.



A case pushed as far up as the breechface will allow. Notice how very little case is available in the ejector slot for the ejector to strike.



Original ejector is shorter than optimum. Lack of height can allow missing the empty. Several other aftermarket ejectors were tried with no improvement.





New modified ejector uses all the slot height available. Can not miss striking the empty.



Here is one of the aftermarket ejectors I examined. It broke as I gently removed it from the frame. Notice how 1/2 of the broken surface is blued. Indicates that it was cracked before it was blued. This one was also too short and left large gaps like the original.





The modified new ejector prior to machining. Added steel blocks of 38-42Rc chrome-moly. After silver-soldering hardness increased by a few points.


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Post Posted: Sat Nov 19, 2011 11:57 pm 
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Couple more pics of fabricating oversized ejectors from bar stock:




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Location: East Tennessee

Post Posted: Sun Nov 20, 2011 12:00 am 
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Chuck, that's a real project. This thread is like a PHD in ejector theory!

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