I read in a magazine about this model 100 I have one in 284. About replacing the firing pin because of prefiring. They gave a number to call so I call there sending me out. A package of what to do. Has anyone here had this done was there a charge? winchester was fixing the problem in the 90's for no cost. But I didn't know of that the rifle was my grandfather. I' am glad no one got hurt well hunting with the 1962 rifle. Here is the # 1 800 852-5734 for those who have a model 100. SORRY LAWDOG I PUT THIS IN THE WRONG CATAGORY.