The piss takes aside, I am not a big fan of Kimbers but saying that I would expect 1.5 inchs at 100 as the starting point. If it were mine I would try a brand that's a bit slower down the short barrel, must stabilize better.
It's not a cheap exercise to play with ammo brands but sometimes it 's worth it. Corelocks or Federal might be worth a crack but I would def try something slower first then bullet weight.
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