I bought my first gun a month or so ago and have been reading a lot about it. I got a fair deal $185+tax, in ok condition. The only thing that is strange to me is that I have read a lot about the "polygonal" rifling. My concern is that the gun is not. I can clearly see the lands and grooves, instead of the "hills and valleys" that polygonal should be. So my question is: Is this gun polygonal? Maybe just hasn't been used enough to wear away the grooves? Or did someone replace the barrel? The numbers on the barrel match the number on the slide.