Just picked up a 4 inch stainless model 94. Put about 200 rounds of federal and winchester 333 bulk through it. While cleaning the very dirty revolver I noticed some strange flame cutting marks. While it did have the standard falme cut line I have come to expect on all revolvers, this one had some spare steal burred up along the cut that looked to be peeled back and melted. Thoughts? Should I be concerned? I took a light file to the peeled back burrs.