12-18-2011, 06:22 PM
Personally, of any non traditional rifling, things like 5r or Polygon are the most appealing to me. But having said that, traditional rifling remains the safe bet. Progressive rifling, I would be more weary of. Why? because it doesn't have a consistently static engrave angle. That means that it will sheer the jacket by having a change in twist pitch. Just imagine twisting a flathead screwdriver onto the surface of modeling clay. I would stay away from it, but that's just me.