Just picked up a sp-01 yesterday. No rounds through it yet but when I field stripped it today I noticed some decent gashes on the underside of the barrel - the flat part that comes in contact just over the trigger assembly. It doesnt look like normal surface wear, but deeper lines to where I can feel them with my fingernail if I run it across. Will these work themselves out over time or is it not something to be concerned with at all. Thanks!