CM9 bbl. in a PM9

[Thunder71]

At that price... hmmm...

MK9/PM9/CM9 ... gotta have one of each flavor, right?

[Bawanna]

I tried to find the source I heard it from regarding lead and polygonal barrels. I saved it for just such an occasion and put it someplace where I knew I wouldn't lose it. You know how that goes.

Based on what I recall it really isn't a buildup even far as the lead goes its a pressure situation. The article and it was from a viable source although I can't recall that either said you could shoot a 1000 rounds of lead through a poly barrel but it could blow up on 1001 or 597 or #1. Many get away with it without issue so I don't think there's any way to really foresee it coming.

Jay @ Kahr is a respected source (I don't know him personally) but if he says the sky is falling you better grab your hard hat.

[JimC]

I find that hard to believe. I would sur elike to know what tyhe diffrerence is EXTERNALLY..

Here ya go... jay.dandrea@kahr.com ask him for yourself.

[JimC]

Jay @ Kahr is a respected source (I don't know him personally) but if he says the sky is falling you better grab your hard hat.

My opinion also. I have dealt with him via e-mail several times since I purchased my PM9 in July and I have always trusted his advice/opinions on Kahr related issues.

I trust him more than I do Internet supposition or conjecture.

[Bawanna]

My opinion also. I have dealt with him via e-mail several times since I purchased my PM9 in July and I have always trusted his advice/opinions on Kahr related issues.

I trust him more than I do Internet supposition or conjecture.

I trust him too but where do I fit in? You think I'm a supposition or a conjecture. I'm gonna have to look them up, both kind of sound like they might me wild arse guess?

I guess if I get to choose I'd pick conjecture, a little more macho sounding, now I'm sure if Dietrich was to choose he'd pick supposition on account of his fondness for similar sounding words and such. Maybe I'll ask him, this will make his day.

[JimC]

Ok sports fans, here is the answer I received from Jay just minutes ago in regard to why the CM9 barrel will NOT work in the PM9 pistol.

Good morning. The barrels are completely different shapes and are not made to lock with the slide in the same way. I hope this information helps and apologize for any inconvenience.
sincerely,

Jay
Kahr Customer Service
508-795- 3919

You guys can debate it all you want but, it looks as if one can not use the CM9 bbl. in the PM9.

[Thunder71]

BS

LMAO

Thanks for the follow up!

[jocko]

huymm very interesting indeed. thanks. Jim C, ur on the ball. would have made for a nice test to..

I wonder if anyone is on our fourm who has both and who could post a photdo of each barrel so we can see what changes kahr made... I think I will now pull my abouve thread to. not trying toargue here with anyone, just trying to understand why they made this change..

[kahrlover123]

I have the PM9. Some of my buddies have CM9. Would I want to change the barrel to find out? Hellllllllll Noooooooooooo.
My PM9 is shooting perfectly. Why do I want to screw things up? Specially Jay from Kahr (I've dealt with him lots of times too) already says NO

[CJB]

On the lead - polygonal - pressures thing... I dunno.

Here's what goes thru my mind, with some considerable first hand "guy behind the counter at the range" experience - about ten years worth.

If you're shooting lead thru a poly barrel, and it starts to lead up, the #1 thing thats gonna happen is you're accuracy is gonna go to poo. You're gonna keyhole, and get whing-ding fliers. You're gonna experience other problems - as lead will build up at the front of the chamber, as also will lube used, no matter if its "dry" or not.

Good sense says - hey clean the damn thing out!

Practical sense says, if you're shooting lead, lots of lead... pop a brush thru that puppy every so often! I wont go into de-leading procedures, but higher speed lead bullets will lead more than the same bullet at lower speeds. Same with lead hardness, harder being less likely to leave deposits.

Just sayin... its a problem that can managed

~~~

Also... I've followed the Glock KABOOM events pretty closely. To the best of my knowledge, there's been a big deal about frame problems, some barrel problems, some slide issues... but not seeing much on lead-in-the-bore issue as being a source of KABOOM. Not saying some idiot didn't have an issue. Not saying the issue was really lead either, because something like a lead squib might be attributed to lead in the bore "after all everyone knows you're not supposed to shoot lead in a Glock". I'm sure someone someplace sometime may have shot enough lead thru a Glock to cause an issue.... statistically its possible.

~~~

Funny thing too, when you really lead up a gun... you get this tube of lead... irregularly shaped on the end, that protrudes from the end of the barrel. Quite literally, if a customer was shooting lead, and noticed the "tube", and complained, we'd just take a pocket knife and cut it off, and hand him back the gun (usually our rental).

In cases at the range - we loaded everything fairly soft (lead was cheap, tin/antimony more expensive). We had to load the 9's and 45's enough to cycle the guns. The 357's were really dirty though. We had NO control of what folks shot in guns before, after, or during the shooting of our El-cheapo reloads. Not once in ten years did I see a barrel go south due to leading of the bore, and subsequent shooting of high power ammo through a dirty bore. I did see my share of squibs, a few egg'd barrels from squibs, and one blown .45 barrel that the "gun smith" blew up with his own reloads.
And I saw a terrible accident at another range (Markham Park) where a 44 Super Blackhawk went to pieces with the owners reloads. That accident didn't hurt the shooter, but the cylinder pieces caught the hand of the guy next to him, and did some serious (maybe permanent) damage.

[dirtengineer]

...And I saw a terrible accident at another range (Markham Park) where a 44 Super Blackhawk went to pieces with the owners reloads. That accident didn't hurt the shooter, but the cylinder pieces caught the hand of the guy next to him, and did some serious (maybe permanent) damage.

Wow, what kind of loads do you need to blow up a blackhawk!? They are pretty strong guns.

[HeyGuysWatchThis]

Ok sports fans, here is the answer I received from Jay just minutes ago in regard to why the CM9 barrel will NOT work in the PM9 pistol.

Good morning. The barrels are completely different shapes and are not made to lock with the slide in the same way. I hope this information helps and apologize for any inconvenience.
sincerely,

Jay
Kahr Customer Service
508-795- 3919

You guys can debate it all you want but, it looks as if one can not use the CM9 bbl. in the PM9.

Very interesting. I can only assume it has to do with the differences in how the slides are machined between the CM and PM models. Oh well, thanks for being willing to try it out and answer the question, JimC! It would have been interesting to find out once and for all.

[JFootin]

Very interesting. I can only assume it has to do with the differences in how the slides are machined between the CM and PM models. Oh well, thanks for being willing to try it out and answer the question, JimC! It would have been interesting to find out once and for all.

Agreed. The whole idea was to reduce production costs by lessening and simplifying the machining processes on the slides, and apparently that was the case on the inside, too.

[JimC]

I received some information earlier today, NOT from Kahr Arms, that what I was told by Jay at Kahr Arms customer service about the CM9 barrel not being compatible with the PM9 was incorrect.

I have no way to substantiate what I was told, I don’t even know the original source for this information and I have not received any further information.

In light of this, I will have to believe what Kahr Arms has told me about the two models and their barrels unless they, Kahr Arms, tells me directly that their first response was incorrect.

I'm done with this issue and no longer have a need to know about the difference in velocity between the two barrels.

[Bawanna]

Jimc your right to believe what your told from a manufacturer but when doubt rears it's ugly head it sometimes pays to research if you can.

I can't say this "officially" but I have it on high trusted authority that if your PM and CM are both new models the barrels will in fact interchange.
If your PM is the old style or what we call the blunt nose it would be shorter and would not work.