I have had a Tactical Ultra II for several years and it is an awesome pistol. It fired almost everything from the very beginning. I had the ramp polished after about 100 rounds and since then, it has fired everything and anything with no exception. I stick with 230 grain hollow points - either Federal or Winchester. It will fire anything you are comfortable putting into it. I would suggest, however, getting a couple of upper end mags. I use Wilson mags. I think they are better then what Kimber sends with their pistols.
I think you will like this gun and you'll really like carrying it (just don't forget that it is there!).