My good fortune with the .303 ammunition continues. My friend has just given me an ice cream container full of slightly dirty shells. A slightly damp cloth has cleaned up 3 samples that now feel clean to the touch but still have a very slight matt patina. I have enclosed pictures of what appear to be the 3 most common head stamps and some before and after the damp cloth pictures. Questions. Would you shoot this ammo? Is the damp cloth the best method of cleaning? What do I have and who made them? Most projectiles are nickel “plated�