I donot have a Kimber or Sig so cannot comment on them, but I have two XD9's one tactical and one service. The tactical has about 3000 rounds through it and not a problem. The service has about 8000 rounds and no problems. The only ammo I did have a problem with in both the tactical and service is S&B Range Safe Ammo would not eject. Tried some S&B regular ammo and no problem. Other than about the ammo I've had no other problems with my XD's.