On the positive side, the group is still "round". I'd not be surprised if you find a load that would do 1 1/2" or better for 10 shots in succession.
From your posts on here, I know you've had some nice stuff! I don't think the factory Kimber barrels are on par with the really good ones...
10 in an inch with a factory Kimber would be the exception, not the norm in my opinion. I'd play around with different loads until you find nirvana.
