Hi, I just got my new handguns today and I am real excited. However, I am seeing a bit of a problem with my S&W M&P 45. When I load the magazines to their capacity of 10 rounds and I attempt to insert the mag into the gun, it won't go. It sounds like its bumping into something and it just feels like it won't fit. I don't get this at all. However, when I load the mag up with only 9 rounds of the .45, it fits just fine. I know however this gun has a 10+1 capacity. Can anyone give me any advice what to do to remedy this problem? I am a bit irritated about this.