Need help from 1911 expert.

G

grizz223

New member
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.
 
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?
 
It jammed nose up at the top of the barrel. Thanks for your responce
 

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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?
 
I suspect the extractor tention but why would it not do that all the time?
Click to expand...
Extractor problems can be maddeningly intermittent. Do the shake test, but it does not sound like an extractor (too little tension), problem to me...extaction, ejection problems are more likely to be the extractor than what you describe unless it is way too tight.
 
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.
 
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.
 
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.

Jim
 
There's also raised followers, with a kind of hump, for doing the same thing as the dot
Click to expand...
I used four different mags to include 2 Colt,1 Chip Mccormick and 1 Metal form mags
Click to expand...
Metalform magazines come with round or convex followers,OP has already tried
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.
 
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.

2 Colt,1 Chip Mccormick and 1 Metal form mags all are 8 rounders
Click to expand...

Among highly trained and keenly observant law enforcement types, that there's whatcha call...a clue.


BOB.jpg
 
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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.
 
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.
 
With any feed-related malfunction, the magazine is always the first suspect. Always.
Click to expand...

It's amazing what one little bend to a lip of a magazine can cause. I have straightened many magazine lips causing feed problems in my time. Some magazines come in, where the owner said they merely dropped it on the concrete floor at the range, and it caused the problem. On thin sheet metal, it doesn't take much to screw the proverbial pooch.
 
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.
 
re:

Since I am not LEO the clue is somewhat eluding me,
Click to expand...

If the gun is doing what's shown in the picture, it's a magazine problem. Specifically, a magazine spring problem. All the magazines that he mentioned are 8-rounders. At least two have the folded Devel-type follower. There's two strikes against'em from Jump Street. Seen a lotta the same trouble with those. Don't know about the other one...but it still probably doesn't have enough spring.

Now we wait for more detailed information.
 
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