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July 25, 2013, 09:28 PM | #1 |
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Need help from 1911 expert.
Ok so I got a Olympic Arms Cohort 1911 Commander type. First let me say I love this pistol it fits my hand perfect. I know it's not a lot of people's cup of tea but I relly like it. Anyways took it out last week put about 100 rounds thru it. So here the question on about every third magazine the last round woud jam nose up but it did not happen all the time. I used four different mags to include 2 Colt,1 Chip Mccormick and 1 Metal form mags all are 8 rounders it happened in three of the mags but not always it was intermitent sometimes it would feed all the way thru other times not.I suspect the extractor tention but why would it not do that all the time? Anyways does anyone know what would cause this if so please let me know as i'm going to have some work done on it.
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July 26, 2013, 10:17 AM | #2 |
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Where did it jam?
With the bullet under the barrel? With the bullet up against the top of the chamber entrance? Where was the cartridge rim? Any chance of a picture, either of your gun or something similar off the web?
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July 26, 2013, 10:32 AM | #3 |
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It jammed nose up at the top of the barrel. Thanks for your responce
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July 26, 2013, 10:42 AM | #4 |
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A picture of the actual jam would have been helpful...a picture of just your gun is not likely to lead to a solution.
Is this a used or new gun that you just bought? Has it worked in the past? Have you or anyone else done any "work" on it? |
July 26, 2013, 10:49 AM | #5 | |
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July 26, 2013, 11:03 AM | #6 |
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The gun is used don't know how much but it looks and feels great. Does not seem abused at all. For all i know could still be in it's break in phase. Does not look like it was shoot alot. very tight no rattle at all.
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July 26, 2013, 11:11 AM | #7 |
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You have to eliminate extractor tension before you go on to other possible
causes,again the live round shake method tells nothing at all.Like every other spring in your firearm it has working specs,please test the rim pressure of the extractor and post if you will the result I'd be willing to bet it is too high. |
July 26, 2013, 11:30 AM | #8 |
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ok how do I test the rim pressure?
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July 26, 2013, 11:42 AM | #9 |
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Bill Wilson's Extractor check and tuning:
http://www.m1911.org/technic2.htm
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July 26, 2013, 11:54 AM | #10 |
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I will have to wait till I get home to look at the link but thanks to all that helped me.
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July 26, 2013, 12:48 PM | #11 |
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Does the magazine have a little raised dot in the middle of the follower? If not, it should. That dot keeps the last round from pushing forward when the next to last round feeds; if it is not there, you will get a jam just like you described. Some gun and magazine makers don't understand the reason for the "dot" so they leave it off to save $0.000001.
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July 26, 2013, 01:11 PM | #12 |
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James K I will look when I get home. Thanks
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July 27, 2013, 08:34 AM | #13 |
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The dot style follower can be bought seperate.
There's also raised followers, with a kind of hump, for doing the same thing as the dot. They can be bought and installed in any mag. Here's one version http://www.brownells.com/magazines/h...-prod9770.aspx
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July 27, 2013, 10:36 AM | #14 | ||
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Quote:
Quote:
several types so it is unlikely that it is a magazine issue,if the extractor checks within specs then I'd look at the ammo being used. I think he has a custom made pistol so it could be ammo fussy,COAL,bullet type and so on. |
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July 27, 2013, 12:58 PM | #15 | |
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Nose Up
Does it look like this?
If it does, take note of the relationship of the breechface with the case extractor groove. This is called a Bolt Over Base misfeed. It's common with a weak magazine spring or too much recoil spring...or sometimes both. Essentially, the slide is outrunning the magazine, and the breechface catches the case in the extractor groove instead of the back of the rim. Butt goes down...nose goes up...and there ya are. Quote:
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If your front porch collapses and kills more than three dogs...You just might be a redneck Last edited by 1911Tuner; July 27, 2013 at 01:04 PM. |
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July 27, 2013, 01:21 PM | #16 |
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Need help from 1911 expert.
If it looks like the picture above get several recoil springs and switch them out. Run the highest weight you can that will run the gun reliably.
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July 27, 2013, 01:24 PM | #17 |
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re:
No. If it looks like the picture above, get a decent magazine.
With any feed-related malfunction, the magazine is always the first suspect. Always.
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July 27, 2013, 02:54 PM | #18 | |
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July 27, 2013, 03:18 PM | #19 |
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Always
OK,three different make magazines do the same thing.
Since I am not LEO the clue is somewhat eluding me,??? I think we need OP feedback and a little more information,I've seen those three pointers before,not very amusing,not to be obdurate really but I still think the extractor is interfering with the feed cycle and I would not replace the recoil spring or polish the feed ramp either. |
July 27, 2013, 04:05 PM | #20 | |
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re:
Quote:
Now we wait for more detailed information.
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If your front porch collapses and kills more than three dogs...You just might be a redneck Last edited by 1911Tuner; July 27, 2013 at 04:11 PM. |
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July 27, 2013, 06:06 PM | #21 |
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Eight rounders!! I knew it.
By the way is that a laser thing on the grip? no wonder that gun don't work. |
July 28, 2013, 06:12 AM | #22 |
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All right gentlemen sorry I have not posted more been real busy at work. As to the mags all four work in my other 6 1911's. The Olympic Arms 1911 Cohort (commander sized) I bought has a weird spring set up it has a full length guide rod with multiple springs and a Hex type screw holding it all together also the back end of the guide rod is different than any I have ever seen. The whole gun is super tight like you would see in very high end gun like Les Baer. I love this pistol it fits my hand like a glove. Any way as soon as I can get it to a smith I will have some custom work done to include a reliability package, a bobtail and a tritium front sight. Also thank you all for your responses I appreciate all of them. I was thinking that the problem might be an easy fix but probably not.
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July 28, 2013, 10:18 AM | #23 | |
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Quote:
gunsmith,The proposed solutions are not hard to implement and require no tools a pair of extra power mag springs will not set you back that much and only improve their performance anyway.And as to checking the rim pressure the process is very similar to testing trigger pull weight I use a simple method which I posted here before,the last time time though some pharmacist gave me a hard time about apothecary weights or something and I'm not about to get into that again.Good luck |
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July 28, 2013, 10:38 AM | #24 |
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I will attempt the fixes but it's still going to the smith for the stuff I mentation in my last post. I also polished the feed ramp and the rails. Just a little Mothers mag polish smooths things right up.
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July 29, 2013, 09:31 AM | #25 |
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In defense of eight round magazines, I have four Chip McCormick ones, that are nearly twenty years old.
They still have their original springs and have had many, many thousands of rounds through them. And they just work. Not only in mine, but for many others that I've loaned them to. (New folks at the matches never seem to have enough mags for those long courses of fire).
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