Feeding problem with AI magazines in a Cadex Chassis

Assume you mean you are trying to rock the mag forward... or in other words... lift the front of the mag relative to the bolt..

That was what I suggested in the opening post and why I suggested opening the front of the feed lips.

Allows the bullet tip to "aim" at the chamber ... not the feed ramp.

Plan B would be to put some electrical tape on the bottom rear of the mag. This will cause the mag to tilt up at the front when inserted... you are shimming the mag. Try some cardboard but electrical tape is so much easier. If that works, problem identified and then you can work on a more elegant solution.

A tab at the rear of the mag well to act as a wedge would work nicely me thinks.

Jerry
 
2 things I would try. Will the mag feed properly with some even upward pressure from the bottom? Mag latch too short?
Take 1 magazine and open up the front half of the feed lips. Test. Open up more if necessary. It would act similarly to tipping the mag back.

The other thing i would look into is calling Cadex. 1 other person mentioned possible out of spec mag well. If the mag well is too long front to rear. The mag would tip forward as it's held in at the rear. Which is why it would work perfectly when rocking the mag rearward.
 
CanuckR said:
2 things I would try. Will the mag feed properly with some even upward pressure from the bottom? No
Mag latch too short?
Take 1 magazine and open up the front half of the feed lips. Test. Open up more if necessary. It would act similarly to tipping the mag back.
I am making progress but not there yet I have opened up the front half ALOT and the rear a bit as well .
It is feeding better and will keep trying

The other thing i would look into is calling Cadex. 1 other person mentioned possible out of spec mag well. If the mag well is too long front to rear. The mag would tip forward as it's held in at the rear. Which is why it would work perfectly when rocking the mag rearward.
Click to expand...
There is no forward or rearward play when the mag is inserted and just a bit of vertical freeplay (aprox 1/4 ) .
 
CanuckR said:
The other thing i would look into is calling Cadex. 1 other person mentioned possible out of spec mag well. If the mag well is too long front to rear. The mag would tip forward as it's held in at the rear. Which is why it would work perfectly when rocking the mag rearward.
Click to expand...

^^^^^ This would be the best thing to do.

Cadex chassis come with a magazine sleeve for different styles of magazines. Might just be an out of spec sleeve..........or maybe even the wrong sleeve....
 
As it is I got the mags to work but the feed lips are pretty much maxed out as far as holding the rounds in the mag.
I spent a couple days of trying different widths and this is what I found . .520 inch at the front and .440 inch at the rear of the feedlip work on my mags .
I can get the MDT polymere mag to work if I push up on the bottom front of the mag and retain pressure while cycling the bolt .
The A.I feed lips had to be bent out as shown below and work fine but I have to take care when inserting the mag into the magwell as the rounds are not in contact with much of the feed lips now .
My fingers are sore as heck from loading mags all weekend but I am a lot happier .
The new unused mag is on the right in the pic .I was contacted by Cadex and we are looking into the issue
 
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Oh those poor mag feedlips. A little minor adjustment is sometimes ok. That is too much IMHO. I think the issue is the mag to action alignment.

Couple of questions. Is there any bedding that may have raised the action in the chassis? The gap between your mag and your action is too high.I don't know enough about the cadex system to give precise advice, but in regular stocks + dbm, the solution is to sand/mill some combination of the top or the bottom of the chassis so the action gets closer to the mag.

On my stock, I filed the dbm and the stock bedding until it got close enough for the bolt to ride the feedlips as close as possible without touching.

On a cadex chassis I would need to see the inside of the mag well in detail, but my guess (to discuss with cadex first) would be to sand the top of the chassis to get the action to sit lower, thus better aligning with factory mags.

Please dont mangle any feedlips until you solve your chassis issue first.
 
I agree and can get them back to original specs quickly now. I feel the issue is in the magwell of the stock .
I was contacted again by Cadex and asked for some dimensions on the magwell and the magazine catch height on the mags.
But in the mean time I am using them as is because they finally feed reliably for once :)
 
I was told it's not a common issue with their products and their mags I believe are accurate mags, that's what I got when I ordered one from them in 300wm. They were very good in dealing with the issue though. It's been just under 2 weeks from my initial conversation with Patrice and the new mag well was rushed into the paint booth and should arrive at my door today. I competed with another guy running the same chassis with no issues but if you do have an issue talk to Patrice right away to get it sorted out. I thought I had mag issues so I tried almost every mag available with no success. Once ingest it out with the new magwell I'll post my findings.
 
Well I tried out the new magwell today, same issue as before. The front of the mag falls down when loading a round. Waiting for a response from cadex
 
Mine wont move forward or back at all when locked into position and seems to fit into the magwell perfectly.
There is approximately 1/4 inch freeplay up and down at the front and rear of the mag with the bolt to the rear.
I assume it is for inserting a loaded mag with the bolt forward as most of this freeplay is gone when the bolt is forward.
If I push the mag all the way to the top with the bolt to the rear as soon as I close the bolt the mag gets pushed down ...is this what you mean ?
I ran a few more mags through mine and it is feeding better than it ever did and feels very smooth .
In my case the rounds were jamming in a nose down position while they are still a couple below the one in the chamber.
Once I got them to sit higher in the mag at the front and rear it worked fine .
 
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interesting. I ran a cadex field strike for ~18 months with 3 different accuracy mags and never had any issues with feeding. In fact, 2 of the mags held 12 rounds if I REALLY stuffed them full, but they always fed reliably in my field strike.
 
Mine doesn't have the up and down play like yours does but front to back play so the back of my mags are held good by the mag catch but it seems that the magwell is to long so the front of my mag pushes down when feeding a round in and it nose dives down like yours and gets stuck under the feed ramp. I put 3 pieces of electrical tape on the front of my mag to get it to fit tighter and seems to work great but the mag is to tight for quick mag changes with the tape being a little sticky. Just waiting for a response from cadex again to see what their advice is now.
 
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