Hi everyone I would like to start out by sayin I'm new here to the forum. I joined up in because I have a gun that is puzzling to me and to hopefully learn more about other things as well. Well on to the puzzling gun I picked up a interarms mark x here is the puzzling part it's chambered in 458x2" American. I had it verified by a gunsmith that that was the right round he also told me that it was not rechambered to that round. Now I have been through every gun book I can get my hands on and from what I have read and seen interarms never chambered a gun in 458 American. All the 458s were chambered in winmag or Lott. My question is does anyone know more about the interarms co and if they chambered a few guns in American. Do I have some rare or one of a kind gun or have I just over looked something. I'm hoping someone here can help since I see no way of contacting a company that's been out of business.