I was hunting in a park that is near an 1863 Union encampment. The area of the camp is completely covered in houses, but the park is close enough to have been occupied. The problem is that most of the soil has been graded and turned. I did find a small patch of woods that looked relatively undisturbed. Unfortunately, I found at least a dozen pull tabs and a few metal scraps. The only thing I kept were two very old shotgun shell bases, and these two small metal objects. I was wondering if there is any chance that these might be friction primers. they were from the same area about 10 feet apart. Probably wishful thinking on my part , but I would value other opinions.