Last week I purchased a Pro Carry II and today I went to the range to break her in. I put about 300 factory rounds through the gun. The problem I'm having is about every shot the slide fails to return to full battery. I actually have to push it back into battery after every round. I called Kimber and they asked how well the gun was lubed. I think I lubed it very well prior to firing, could it be anything else. I am new to 1911's but very familiar with most every other firearm. Any help would be appreciated.