I am trying to educate myself about a Niedner rifle that belonged to my Grandfather. He has been gone since 1980, but his Niedner remains in the family. He was a world class collector, and an expert marksman. He did shoot at Camp Perry, and was well known in his day. I have tried to search online, but this rifle has what I think is called a rolling block action, and all I can find are bolt actions. Help, please. What kind of identifying marks can I look for? The top of the barrel is stamped with Niedner Rifle Corp, Dowagiac, MICH.