Here's a post on breaking in a Kahr from Kahr's user forum:
Proper prep of a new kahr
Here are some helpful suggestions to set your new kahr up before heading to the range as compiled by Jocko, with the help of the forum members.
#1. Read and then Reread your owners manual. There is some real MUST DO's in there that if you don't you will have issues.
#2 clean ur new gun, dont' assume Kahr did it, They don't and there could be crude in places that it should not be. Take that slide off and that little hole in the bottom of the slide, that is your clean out hole into the striker channel, Insert your spray cleaner nozzle in there and spray away. Fluids will come out both ends, Now with one finger pull back on the striker at the back of the slide and continue to spray in that hole and also spray clean from that breech hole also. You have now cleaned that striker channel without dissambly, DO NOT OIL THAT STRKER CHANNEL. Refer to the kahr tech section and the 2nd sticky down is KAHR LUBE DIAGRAM. Point #9 shows that clean out hole and this is the best lube chart for any semi auto to..
#3 grease the slide rails or if you prefer a certain gun oil, fine. just lube the slide, and better yet go to the kahr tech section and hit on the kahr lube section. This will save alot of explaining. If you have a dremel, I would suggest a good polish on the already smooth feed ramp and inside the chamber also..U can't hurt anything buy a nice polish job. The lube chart is the 2nd sticky on this KAHR TECH thread. It is simply the best ..
#4. Now sit there with an empty gun and no magazine and rack the slide about 500 times as fast as u can, they helps break in without the bang thing.
#5 Take your magazines apart and recheck to see that they are properly put together right to. then if you have some 600+ grit auto sand paper just roll it up like a pencil and polish the under side of the feed lips on your magazines. Do not oil the magazines, wipe with a silicone cloth at best.
#6 to check to see if you have no issues with the slide lock lever hitting the rounds in the magazine, take the slide off and insert the slide lock lever and then reinsert a loaded magazine and see if that top round is hitting the slide lock lever and moving it upward. That is a NO NO.
#7 break in the gun with fmj ammo, forget about the defense stuff until it is running right, Practice close, stay 7 yards and under, get a good grip on the gun and watch your thumb to see that it is not accidently hitting the slide lock lever and causing premature slide locking open. This is a known cause of premature slide locking open..
#8, Don't worry about the accuracty thing until you have the gun running reliable with both types of ammo. Sometimes the 200 rounds break in is necessary, Most of the time, if the gun is pre-prepped properly it does not.
#9 Be aware that you can limp wrist these little guns far easier than the bigger ones. Keep your shooting at 7 yards and under
#10 Kahrs have a looooong but totally smoother trigger system, GET USED TO IT. More rounds down range the better your groups will be to. remember you and the gun have to mate up also correctly for all things to work right. A very good test of your shooting skills with a kahr is to buy a half dozen snap caps and throw them in with 30 rounds of fmj range fodder. Let someone load your magazine for u, so u don't know if any snap caps are in that magazine. I can assure u, it will show ur shooting errors BIGTIME..
We will continue to add to this section in hopes that later on down the road we can just direct a new owner to this thread and not have to keep
repeating ourselves
Good luck and just shoot it like you stole it.. and many Thanks to those who have contirbuted...
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Proper prep of a new kahr - KahrTalk Forums)