I have a 5 yr old Hi-Point 9mm 995st carbine bought NIB. Now, before I get cracked on for having a Hi Point, Let me say the gun functions well, 1 or two jams in five years, is accurate enough, no tack driver but will make 5 round 2.5 inch groups at 30 yards. My concern is the last time I took it to the range, I noticed scorch marks on the ejected 9mm brass, all near the rim and in one spot. I was shooting PMC bronze that day. I should have saved or taken photos of the burnt cases but didn't think of it at the time, I scooped them up and canned them in the brass bucket, as there was a T storm rolling up on the range. anyone have any ideas on what the scorch marks are about?