Like most Kimbers I expected it would need a break in period but that was not the case. My KimbeIn terms of caliber, r Micro has also been flawless with FMJs as well as with Hornady 90 gr XTPs, and the round count is well over 1000 now.
It reliable and more than accurate enough for self defense shooting.
It's also a good choice for a female or an older person as the locked breech design requires a very light recoil spring so it is easy to rack the slide.
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In terms of .380 versus 9mm in a micro sized handgun, I'd prefer my wife carry the Micro than the Micro 9. The Micro 9 is a little longer in the grip to accommodate the longer 9mm para round, but it isn't much larger or heavier. That's not a positive in this case as the Micro 9 is fierce to shoot. Fierce enough that many people will never shoot it well, and most people will never want to shoot it enough to ever get good with it, even if they can tolerate the recoil.
When you consider that all handgun calibers are in adequate in terms of stopping an assailant and that it's shot placement that gets the job done, I'd much rather my wife own and carry a Micro in .380 that she'll actually shoot enough to get good with, compared to a Micro 9 that she won't want to shoot at all after the first magazine.
In fact, I tolerate handgun recoil very well, but the smallest 9mm Para I will consider for concealed carry self defense use is the CZ 75 RAMI, and it's significantly larger than the Micro 9.
In short, the issue of carrying a Micro 9 or Sig 938 versus something larger or something similar sized in .380ACP really comes down to whether the person wants to carry a weapon they can truly be effective in shooting, or whether they want to carry a really tiny 9mm and then just pretend they'll actually be able to shoot it effectively if they ever need to use it in self defense.
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To be honest, given that I own four Kimbers and have never had a problem with any of them, my first thoughts when I hear about a Kimber owner who says they have reliability issues are:
1) Did they really own one or are they just jumping on the Kimber hate band wagon.
2) Did they mess with it (after market springs, shock buffers, etc) and screw up the engineering? (Which is critical on the smaller compact and micro 1911s.)
3) Did they shoot it enough to break it in before complaining about it, sending it back, or messing with it?
It's possible they just got a bad one, and I'm pretty sure we've heard about every Kimber ever made that had a flaw as it's popular to complain about them, while the other 999 out of a thousand Kimber owners just shoot them and don't necessarily post about it.