The Kimber is now at 1247 rounds fired. Since completing the 500 round break in period that Kimber recommends, it has shot 747 rounds and experienced one failure to extract. Compare this to the first 500 rounds where it experienced 4 different malfunctions. At least in regards to this gun, perhaps the “break in period” isn’t a myth after all.
To elaborate on that further, the issue that appeared to be causing the malfunctions was that the slide was closing too fast, indicating the gun was oversprung. Shooting it in seems to have cured it of that issue, and now it runs just fine. Weird? Perhaps. But not unheard of, either. It’s a common practice with some other service pistols to lock the slide to the rear for 24 hours in order to get it to “set” in a compressed position, and thereby reduce the effective spring weight.
I didn’t do that with the Kimber, opting instead for the more expensive route of “shoot it a whole bunch.” My way is also more fun. The current score for the Kimber is 90/100.