Of course it can be reloadedI am having this argument about HK91 brass right now. Based on your reply, I am still confused? Can this brass be reloaded or no? I am currently prepping some , I can not feel the marks in it, it just appears to be soot. I can rub it off with a rag and metal polish. I have some people telling me to reload it, its fine, I have 1 person saying no, its garbage, it will blow the gun up. How can the gun blow up? Even if the brass lets go, all the pressure will want to go down the barrel. If this was a cheaper rifle, I would say SEND IT, but this is a pre-ban HK and it was my fathers. I'd rather not screw it up.
You wont feel the marks, that is just soot. Do not worry about cleaning the marks off, that is too much work
It will not blow up as long as you do not exceed sensible loads. You already know what to do, use good loading practices and work your way up