You probably nullified your warranty with the use of the McCormick mags. I can see where the follower dug into the ramp. If I can see it I suspect the folks at Kimber can see it.
If you are referring to the dings circled in blue below, I clearly stated that they were present when I
bought the gun new (unused) from my Kimber dealer. I pointed them out to the (well established) store owner and he said such marks were common from the factory since they fire test rounds before shipping. I used only the OEM Kimber mag for the first 500 rounds which included many FTF's. After the first 100 rounds (several FTF's), I returned the gun to the dealer gunsmith and asked if the dings could be causing misfeeds. He basically said "no problems, needs to be broken in", "mildly" tweeked the extractor, greased it up with STOS and returned it. Having read the manual cover to cover (500 round break-in period), I chalked it up to break in and kept putting rounds through it and cleaning it to "break it in". At around 500 rounds (still FTF's), I called Kimber and was told it was my form. Asked two shooting instructors at the range and they said my form was decent and shouldn't contribute to FTF's. At the recommendation of local shooting range employees, the Chip M mag and 24 lb spring went in at this time (BTW, the CM mag did not make any observable change in the dings). Problem was worse, so I went with the Wilson mag and stock 22 lb spring which seemed to have greatly improved the FTF rate over a short 50 round session. At about 600 rounds, I took it to a second gunsmith who said the ramp dings shouldn't be causing FTF's and proceeded to "mildly" tweek the extractor.
Go to a lighter recoil spring. If that does not resolve the issue go to a more powerful (Wolff +10) mag spring.
Answers I've been looking for.
Note: The ramp has suffered significant damage. That is your fault. You did not cease operation when you knew there was an issue.
Since day one, I've asked Kimber, 2 gunsmiths and 2 shooting instructors about the dings/FTF's... I've tried to follow the advice of everyone that seemed informed without trying to cut budget corners. As I said, I'm a newb.
You and your type of problem are my favorite to run into at gun shows. I can fix it with less than $20 worth of parts and under an hour of my time.
Judging by your online attitude to a newb, you wouldn't get any of my business. I'd keep looking for someone that knows how to deal with Kimbers
and with people.
And never, ever, feed them crappy ammo like American Eagle or Blazer. That is just asking for trouble.
I can't believe someone would buy a high-end gun and feed it budget ammo. Does that make sense? Like I'll buy a Vette and run it on kerosene.
I'm not trying to take a "budget" approach to self defense. I asked my dealer what ammo to use, and that's what he gave me. I tried some Wincheseter and Remington along with American Eagle (all 230 gr FMJ) yesterday - seemed like the AE worked best. I'm open to suggestion.
On a side note, the stock 22 lb spring (probably getting soft by now) and Wilson mag yielded no FTF's (outside operator error) over 250 total rounds of the AE, Winchester and Remington ammo yesterday. Maybe it was a mag or extractor problem all along, but I'll still experiment with a 20 lb recoil spring as a test.
As for buying a Vette, I chose to buy a .45 after reading articles like
this. After checking out dozens of .45's at 4 different dealers, I could have been happy with a few different models, but I chose this one because my wife found it easiest to manipulate - in case of emergency.