CM9 Nose Diving like a sunofagun

[tallahasseegreys]

CM9 Nose Diving like a sunofagun

Update: P238 functioned flawlessly after cleaning last night and lubing a little heavier than I normally do. 150 Independence FMJ and 50 Hornady Critical Defense. Perfect.

CM9, just back from mothership, had 3 fail to eject and 1 nose dive in the 1st 50 rounds. Then around round 70 it began not firing on the last round; see description of this issue on previous post in the thread. And the coup de grace was around round 90 when the little round nut at the end if the guide rod flew off.

[bonjorno2]

care to send me the mag with upgraded spring since I am assuming you are going to sell the pistol?

[anthony010]

Me too

I had the same problem, but it didn't happen with my six round mag, I have 2 seven rounders, I didn't mark them but I believe it only happened with one of them, but they weren't marked so it could have been both. My malfunction looked exactly like the one in your picture. I am still in the break in, I have only shot about 170 rds. but I read everything and did all pre lube, racking etc.

Just finished reading the whole thread, hopefully I have better luck. I really like this gun. It fits Fits all my needs for EDC

In any case, I am willing to invest another 200 or so rounds in this. I will go back this week with the Magtech ammo which gave me 200 flawless rounds. Maybe Lawman doesn't like my gun(can't believe I wrote that sentence). After that it is going to Kahr. After that it is either going in a holster to defend my life if necessary or it's going to another home.

I am still very interested to see if anyone has witnessed what is shown in the picture.

[jimsea]

How does the bullet end up under the feed ramp?

Because the stock mag follower doesn't compensate for the flair of 9mm ammunition in the mag tube of the CM/PMs single stack configuration. Because of this, the top round is largely unsupported and capable of diving into the base of or under the feed ramp if you don't chamber a round per the instructions in the Kahr manual which specifies a slide stop release.

There are two options. One, slamming the rounds into the feed ramp with the slide stop release will eventually loosen up the internals of the gun enough to cause the rounds to feed more reliably which is what Kahr wants you to do.

Or two, you can spend 5 minutes modifying the mag follower with sandpaper which will cause the follower to compensate for 9mm flair and support the first round so it cannot dive into the base of the feed ramp.

Option two keeps your gun tight and chambering smoothly from day one.

FWIW this is a known issue and Kahr is aware of it. IMO an easy adjustment for an extremely fine handgun.

[anthony010]

if you don't chamber a round per the instructions in the Kahr manual which specifies a slide stop release.

I've been doing this^^^

I will Try option #2 when I get he time. I just ordered the tritium front sight, so I guess I will make it a project day and do both when I get the sight.

[jimsea]

PM me your mailing address and I will send you a modified follower that you can try in your mag. You can duplicate the results by using my follower as an example.

Please send my original follower back to me within the week.

[anthony010]

PM me your mailing address and I will send you a modified follower that you can try in your mag. You can duplicate the results by using my follower as an example.

Please send my original follower back to me within the week.

Thank you, will do. PM sent.

[wack44]

The problem people are having with there cm9's is with the mag, the nose diving is caused by the slide pin, sometimes the nose of the bullet will catch on it causing it to nose dive under the feed ramp. pull the slide back and slide the mag up into the frame with a bullet in it and see how close it is, i have heard of taking off about 10 to 20 thousands of an inch will cure this. seems to happen with 7 rd mags more due to the same mag spring used in both 6 and 7 mags so the spring tension is not as strong to keep the bullet from rocking at the top of mag

[jimsea]

The problem people are having with there cm9's is with the mag......

Anthony will have a modified follower by Wed or so and he'll be sure to let us know how it works out.

[jocko]

thats news to me

The problem people are having with there cm9's is with the mag, the nose diving is caused by the slide pin, sometimes the nose of the bullet will catch on it causing it to nose dive under the feed ramp. pull the slide back and slide the mag up into the frame with a bullet in it and see how close it is, i have heard of taking off about 10 to 20 thousands of an inch will cure this. seems to happen with 7 rd mags more due to the same mag spring used in both 6 and 7 mags so the spring tension is not as strong to keep the bullet from rocking at the top of mag

all my kahr 7 round mags have one more coil in the spring than all of my 6 round mag springs and I think that is the way it is supposed to be. Sound sto me like ur 7 round mag has a 6 round spring in it.. Just sayin

[anthony010]

Sorry guys really been swamped with work, I received the follower on Thursday night. I wont be able to get to the range till Tuesday till Tuesday to test it. I will let you know how it goes.

@Jimsea I will have it in the mail back to you no later than Wednesday..

[jimsea]

Jimsea I will have it in the mail back to you no later than Wednesday..

No worries.

If you can hand cycle the rounds smoothly at home, then you will have no issues at the range. That includes a smart overhand and riding the slide.......both methods should cycle with no issues with the mod follower.

[tallahasseegreys]

Just got the CM9 back from Kahr today. Hoping to take it to the range tomorrow. I am hoping that the break-in period for this gun will not exceed 1100 rounds, as I already have about 900 thru it.


Notes form kahr indicate the slide was replaced, recoil spring assembly replaced, barrel reworked, cleaned, lubed, test fired -OK. Multiple range sessions, multiple shooters.

We wil see....

[phil413tx]

CM9 Nose Diving like a sunofagun

Good luck. Keep us posted

[RogerP9fan]

In any case, I am willing to invest another 200 or so rounds in this. I will go back this week with the Magtech ammo which gave me 200 flawless rounds. Maybe Lawman doesn't like my gun(can't believe I wrote that sentence). After that it is going to Kahr. After that it is either going in a holster to defend my life if necessary or it's going to another home.

I am still very interested to see if anyone has witnessed what is shown in the picture.

Yeah, here you go.
http://www.youtube.com/watch?v=2PrYfWoSFNM