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Posted: 12/13/2020 1:20:26 PM EDT
[#1]
Post a pic of the case under the extractor. There will be some space between the extractor hook and "extraction surface" of the rim, when the case is flat against the breechface. However, the extractor hook should not be long enough to contact the case bevel, which would tend to push the extractor back out of place.
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Posted: 12/13/2020 1:30:22 PM EDT
[#2]
Quote HistoryQuoted: Post a pic of the case under the extractor. There will be some space between the extractor hook and "extraction surface" of the rim, when the case is flat against the breechface. However, the extractor hook should not be long enough to contact the case bevel, which would tend to push the extractor back out of place. Yeah, I think this is still messed up. I don't know how it can be corrected except to find a different extractor.  Attached File |
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Posted: 12/13/2020 1:56:29 PM EDT
[#3]
Can you get a shot with the case pressed to the breechface? Though the hook-to-breechface clearance does look excessive, it may still work if the hook is reshaped a bit. The hook should be off the forward edge of the rim somewhat in a properly dimensioned setup anyway. I like to see about .075" clearance between hook and breechface; once it gets to be over .090", extraction can become problematic.
Also, I believe someone (EGW maybe) makes an extractor without a FP stop slot, which allows you to cut your own slot at the proper location. So that's a possible solution as well. |
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Posted: 12/13/2020 2:13:36 PM EDT
[#4]
Great input Ken.
Just a quick addition - Rick N had always told me the Combatmaster was very particular about the shape and tension of the extractor (among other things). I could pull one he tuned for me apart and try to provide some measurements. |
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Posted: 12/13/2020 2:28:45 PM EDT
[#5]
Maybe it's not ready to shoot just yet. I can't push the case square to the breech face.
It would have to go out if the extractor needs to be cut, I don't have that capability here.  Attached File |
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Posted: 12/13/2020 2:38:39 PM EDT
[#6]
It looks as if you could take some metal off the outside bevel of the hook in order to provide clearance. Without having it right in front of me, it might or might not give you enough clearance to let the case rest against the breechface.
 Attached File |
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Posted: 12/13/2020 2:41:11 PM EDT
[#7]
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Posted: 12/13/2020 4:07:52 PM EDT
[#8]
Quote HistoryQuoted: I have a couple of them, Good score ! They also make excellent BBQ guns  |
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Posted: 12/13/2020 4:17:02 PM EDT
[#9]
Quote HistoryQuoted: I have a couple of them, Good score ! They also make excellent BBQ guns https://hosting.photobucket.com/images/ab282/Uralgunship/CFEE3639_0BBB_43A8_AAD5_CADAED194BC3.jpeg?width=590&height=370&fit=bounds https://hosting.photobucket.com/albums/ab282/Uralgunship/CE057CF5-D785-4443-9F26-7CA8ED8C8BB6_zps3yv0phm5.jpeg?width=590&height=370&fit=bounds That's pretty d**n nice. 
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Posted: 12/13/2020 5:14:59 PM EDT
[#10]
Quote HistoryQuoted: Very nice! Who's the engraver? https://hosting.photobucket.com/albums/ab282/Uralgunship/CE057CF5-D785-4443-9F26-7CA8ED8C8BB6_zps3yv0phm5.jpeg?width=590&height=370&fit=bounds I engraved it myself. I have an addiction to scratching guns up |
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Posted: 12/15/2020 6:34:21 PM EDT
[#11]
Wow, somehow I never noticed this. Someone on the S&W Forum spotted it.
There's a cut-out along the top of the extractor channel there at the rear of the slide. Any 1911 experts know why? Other Combat Masters have this?  Attached File |
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Posted: 12/15/2020 8:30:02 PM EDT
[#12]
Quote HistoryQuoted: Wow, somehow I never noticed this. Someone on the S&W Forum spotted it. There's a cut-out along the top of the extractor channel there at the rear of the slide. Any 1911 experts know why? Other Combat Masters have this? https://www.AR15.Com/media/mediaFiles/171243/CMRear_png-1732747.JPG |
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Posted: 12/15/2020 8:31:09 PM EDT
[#13]
Quote HistoryQuoted: I engraved it myself. I have an addiction to scratching guns up Quote HistoryQuoted: Quoted: Very nice! Who's the engraver? https://hosting.photobucket.com/albums/ab282/Uralgunship/CE057CF5-D785-4443-9F26-7CA8ED8C8BB6_zps3yv0phm5.jpeg?width=590&height=370&fit=bounds I engraved it myself. I have an addiction to scratching guns up Nice "scratch" work. |
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Posted: 12/16/2020 1:39:52 PM EDT
[#14]
The thinned top strap relieved for thumb cocking might have made the slide to thin to contain the firing pin stop. I sadlyI don’t have pictures of my old CM. It’s possible the slide broke and the piece was lost. I noticed the unusual hollow on the top of the slide over the extractor. I wonder if the pistol was dropped and damaged. The original parts might have been lost and might explain why your pistol had the poor fitting firing pin stop.
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Posted: 12/16/2020 4:08:06 PM EDT
[#15]
Quote HistoryQuoted: The thinned top strap relieved for thumb cocking might have made the slide to thin to contain the firing pin stop. I sadly don’t have pictures of my old CM. It’s possible the slide broke and the piece was lost. I noticed the unusual hollow on the top of the slide over the extractor. I wonder if the pistol was dropped and damaged. The original parts might have been lost and might explain why your pistol had the poor fitting firing pin stop. I'm flummoxed. It was definitely machined that way, so not a chunk broke out. Few pictures on the internets of the CM are from the front or rear, almost all of them are from the sides. EDIT to add: I just scrolled through ALL the Combat Master pics on Bing and think the mystery may be solved. Very few pictures show this area. Given this bit of metal is thinner due to the slide scallop, I'm thinking they were prone to failure in that spot. I found a sale ad on Guns International and that gun had a piece broken out in that spot. No, they're not the same gun but the serial numbers are only about 2K units apart.  Attached File |
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Posted: 12/17/2020 8:49:08 PM EDT
[#16]
Quote HistoryQuoted: I'm flummoxed. It was definitely machined that way, so not a chunk broke out. Few pictures on the internets of the CM are from the front or rear, almost all of them are from the sides. EDIT to add: I just scrolled through ALL the Combat Master pics on Bing and think the mystery may be solved. Very few pictures show this area. Given this bit of metal is thinner due to the slide scallop, I'm thinking they were prone to failure in that spot. I found a sale ad on Guns International and that gun had a piece broken out in that spot. No, they're not the same gun but the serial numbers are only about 2K units apart. |
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Posted: 12/28/2020 9:04:59 PM EDT
[#17]
Got back out to shoot the gun with all new springs, extractor, and firing pin retainer.
First mag ejected like a 1911 is supposed to.... sorta. The last round in the mag wants to stay inside. Added a little more tension to the extractor and that seemed to help some. Firing without the mag in the gun told me things are still not right. It isn't ejecting without a round in the mag to assist. If the mag is out of the gun the empties fall out the mag well. Might be time to call an expert. 
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Posted: 1/13/2021 12:02:18 PM EDT
[#18]
@Mainsail
Make any progress with the pistol? |
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Posted: 1/13/2021 12:37:12 PM EDT
[#19]
Quote HistoryQuoted: @Mainsail Make any progress with the pistol? Ammo and time are too hard to come by to make an adjustment, drive an hour to shoot it, drive back an hour, make another adjustment.... It's not far off, but something still isn't right and I've reached the end of my abilities for it. |
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Posted: 1/13/2021 1:22:07 PM EDT
[#20]
I had full auto slam fire problems with mine from the get go. Took it to a few different local gunsmiths. Paid for a few "actions jobs" over the years; all to no avail.
Someone along the way told me about Don Williams. Turned out the magazine (any magazine) was pushing on the disconnector. Also learned, from Don, that it was a known condition in 1911's. I won't pass along his thoughts on the other "1911 experts" that had worked on the gun when I related my history with the pistol to him. So in the end, it was not a Detonics problem. Just an obscure 1911 problem. At any rate, this is the last contact data I have for him; if your so inclined. Don Williams, The Action Works 3030 Center Street West Chino Valley, AZ 86323 9286361691 [email protected] |
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Posted: 1/24/2021 6:02:51 PM EDT
[#21]
Quote HistoryQuoted: Got back out to shoot the gun with all new springs, extractor, and firing pin retainer. First mag ejected like a 1911 is supposed to.... sorta. The last round in the mag wants to stay inside. Added a little more tension to the extractor and that seemed to help some. Firing without the mag in the gun told me things are still not right. It isn't ejecting without a round in the mag to assist. If the mag is out of the gun the empties fall out the mag well. Might be time to call an expert. That's pretty typical/classic of a badly fit extractor/badly tensioned extractor..check the sticky on 1911forum in the gunsmithing section about fitting an extractor. There's a bunch that has to be done with it to make it "perfect". If you haven't checked already, strip the gun, strip the slide then put back in just the extractor and firing pin stop; slide a live round (or a weighted dummy) under the extractor and up against the breechface (as if it were just fired; it'd be plumb flat against the breechface) and then wobble/wave the slide around a bit. The round should not just fall out; it should require a bit of waving/wobbling the slide to get the round to slip out from under the extractor, to fall out of the gun. There's the whole deflection/tension thing to set, but for a really rough guideline...that'll tell you if your extractor has enough tension to at least hold the extracted case until it makes contact with the ejector. You can check that at home, no rangetime needed. Once that's all set up and seems satisfactory...then give the range another try. |
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Posted: 1/25/2021 3:00:37 PM EDT
[#22]
Quote HistoryQuoted: That's pretty typical/classic of a badly fit extractor/badly tensioned extractor..check the sticky on 1911forum in the gunsmithing section about fitting an extractor. There's a bunch that has to be done with it to make it "perfect". If you haven't checked already, strip the gun, strip the slide then put back in just the extractor and firing pin stop; slide a live round (or a weighted dummy) under the extractor and up against the breechface (as if it were just fired; it'd be plumb flat against the breechface) and then wobble/wave the slide around a bit. The round should not just fall out; it should require a bit of waving/wobbling the slide to get the round to slip out from under the extractor, to fall out of the gun. There's the whole deflection/tension thing to set, but for a really rough guideline...that'll tell you if your extractor has enough tension to at least hold the extracted case until it makes contact with the ejector. You can check that at home, no rangetime needed. Once that's all set up and seems satisfactory...then give the range another try. I have another extractor coming from Wilson so I'll see how it fits and if it gets the case head closer to the breech face.  Attached File |
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Posted: 1/25/2021 3:33:35 PM EDT
[#23]
When you press the cartridge flat against the breechface, there is going to be a gap. The top of the hook does not (and probably should not) contact the rim. The main thing is making sure the top of the extractor does not touch the case, anywhere, including the hook. If it touches the case bevel and pushes the extractor out and away from the case, that's a problem...and the top of the extractor hook should be dressed down to prevent that from happening in that case.
The only part of the extractor that should be touching a 45ACP case, is the flat between the front of the hook and the rear of the hook. That's it. It should be holding it (or pushing it) tightly against the other side of the slide. |
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Posted: 1/25/2021 4:35:05 PM EDT
[#24]
I've seen smiths weld up or solder a shim in the FPS slot on the extractor and recut to bring the hook closer to the breechface. EGW also sells an extractor with no slot cut, allowing a custom hook-to-breechface distance.
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