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August 2, 2013, 10:37 PM
If it's new I would send it back for warranty service. Of course, make sure it's not lead/copper fouling to save you the hassle over nothing.
If it's used and warranty isn't an option (not sure about Kahr), I would see how it shot. May still shoot fine. If it's on you a replacement barrel of fire lapping it could be options if it doesn't shoot well.
August 2, 2013, 11:00 PM
In the picture it appears to be a deposit on top of the metal, not a groove. Remove the barrel and clean the inside with a copper bore brush. Insert the rod/brush from the chamber end, push it all of the way through, and then pull it backwards about 10 or 15 times. A pre-soak with bore solvent might help.
If this doesn't work I'd return the barrel (not the whole pistol) to the maker and ask them to inspect it and then forward an opinion. Go from there.
August 2, 2013, 11:06 PM
Old Fuff - it is definitely not a deposit. My dental pick - without a doubt - goes into a depression, not over a deposit.
I bought it used, tonight actually. When I brought to me friend's place, he noticed it and scolded me for not bringing a borelight to the exchange.
August 2, 2013, 11:38 PM
In that case, consider sending the barrel back to the manufacturer (which is far easier and less expensive then sending the whole gun) and see what their opinion is. It is possible it's a manufacturing flaw, caused by a chip getting caught and dragged by a tool. If this were the case I'd expect them to replace the barrel.
August 2, 2013, 11:53 PM
I would give Kahr a call, they should take care of you.
Out of curiosity, which model Kahr did that barrel come from?
August 3, 2013, 12:59 AM
It looks like a chip was caught by the rifling button. Call Kahr and ask for a pre-paid shipping label. I doubt they will let you just send the barrel, for several (including legal) reasons.
August 3, 2013, 02:13 AM
FWIW, Kahr claims to sell barrels, so they may not need the whole firearm back for a barrel swap.
Autopistol barrels for modern designs are drop-in w/o worrying too much about headspace. That's the goal of manufacturers.
Of course, their sales pages have the usual disclaimer about parts fitting.
August 3, 2013, 11:40 AM
IF you don't have the option of warranty replacement, I would suggest shooting it and see for yourself if it affects the accuracy.
Since it IS a depression rather than something intruding into the bore, the bullet may never notice it because it won't touch the bullet.
If it is rough and leaves marks on jacketed bullets (fire a couple into several milk jugs full of water) then a bit of fire-lapping with valve grinding compound may be in order. Lead bullets may leave a lot of fouling at that point in the barrel.
I'm sorry but I'm a mechanic and I look at these things different from most people. I see it as a challenge to figure out how I can fix it. YMMV
August 3, 2013, 10:16 PM
I would concur w/ mtrmn. It won't affect safety, so the question is accuracy. My guess is that there is a fair chance you won't see any accuracy issues induced by the scored section. The crown looks good, and the score isn't even the full width of the land.
Shoot it and see.
August 3, 2013, 10:33 PM
I agree that the flaw is probably not going to affect safety or even cause any problem, but it should not be there on a new gun. I still vote for sending it back.
August 3, 2013, 10:49 PM
Correct me if I'm wrong, but I'm assuming this is not a new gun, which means the manufacturer's warrantee may not apply to you. You should check with Kahr to find out for sure and, while you're talking to them, ask them what options you have with them. Perhaps they'll do an inspection on the barrel and give you a recommendation, whether that be to leave it be, polish it some, or replace the barrel.
As for this being a "lemon", I wouldn't go quite that far. A lemon is something that's operationally broken or requires excessive maintenance and repairs. This defect/flaw may not affect operation or accuracy noticeably at all and may not require any repairs.
It does not appear to be raised, from your descriptions and pictures, and appears to be centered on a rifling as opposed to the edge of a rifling. Which means bullets will pass right over it without notice. If anything, it may require some polishing with a lapping compound to remove any slight raised edges along the gouge.
I'd personally test fire it and see how it shoots. If you have not other issues with the gun and it shoots well, then consider it an easily identifiable, unobtrusive character mark that can be used to identify the pistol if it's ever stolen and had the serial numbers ground off.
(Don't laugh...that actually happened to someone I knew in the Navy and he recovered his stolen pistol from the police by positively identifying such character marks even though the serial number had been removed.)
August 4, 2013, 11:08 AM
While it doesn't affect accuracy and is not a safety issue, someday you might wish to sell that gun and that flaw will garner a nice discount on the asking price.
August 4, 2013, 11:13 AM
She clearly says it's a used gun.
The pictures are not clear, but it could be that someone bubba'd this barrel.
According to Kahr, a new barrel will run you aobut $140 to $155.
As for concerns on resale in the future...this only really matters for investment purposes, in my opinion. At any rate, what you might get for it should be weighed against what you invested in it. If you get what you paid for initially, then in the strictest sense you've lost nothing. Gained, actually, when you consider all the countless hours of shooting enjoyment you'll have gotten from it.
If it turns out to be essentially a cosmetic defect that doesn't affect fit/form/function, then it's perfectly acceptable for your personal use, whatever that use may be. Nobody else has to like it.
Certainly the last thing that a bad guy would do if you ever had occasion to draw your weapon would be to criticize a minor cosmetic flaw on the rifling of the barrel of your gun. I'm betting his focus would be on an entirely different matter.
I also suggest you read Kahr's warranty well. I'm not familiar with theirs however Taurus, Rossi, Armscor, Springfield etc are life time warranty on the gun not the owner. I know I bought a used Armscor gun that wouldn't feed, they replaced it free of charge to me with a brand new gun. The gun was produced 8 years prior to me buying it too.
August 4, 2013, 04:35 PM
"Each Kahr pistol is backed by Kahr Arm's Five Year Limited Warranty. We stand by our product."
The wording of that warranty is probably what's found in this owner's manual: