I purchased a brand new P99 last evening at my local indoor range. I immediately went to the lane and began shooting. After going through several clips, the clip got jammed in the gun and slide wouldn't open. I got help from one of the range masters. He unstuck the clip and fired several rounds with no problem. I continued to shoot. Later, after about 100 rounds, the ejector was jamming. By that I mean the expened shell was not fully being ejected from the gun. I went and got another range master to look at the gun with the shell jammed in the action. He told me it would take about 400 rounds to "break-in" the action. Is this true? Should I be experiencing these problems? The description of the ejector not working properly started happening almost right away. Any help would be appreciated. thanks in advance!!