I dont know if this is the right place to post this but I was cleaning a pistol when I dicovered it.I noticed when I was running a brush through my Kahr.I use a Hoppes rod and a Hoppes brush.I found that when the brush is scwered on to the rod a small bit of the rod end is exposed.I know the rod is aluminum but I am sure that when the tight fitting brush comes forcefully out of the muzzle (know matter how careful I am)that part of the rod contacts the rifling.Could this do serious damage?I have been cleaning guns for years and never noticed this.All comments welcome!