You didn't state which model Kimber. Having a tight frame to slide fit is what most competition shooters strive for. Having said that, I agree with whoever said, "Talk to Kimber". They will probably tell you to strip and clean it. Then shoot it in. However, depending on model, it may have been designed to be a tight fit. Milspec pistols don't have that fit. So, call Kimber and follow their advice. If you still don't like the results, call them again and ask to send the pistol back.
I must reiterate though, having a tight frame to slide fit is not a bad thing. You should get great results with this pistol. IMHO.