I tried firing my wife's deer rifle, and it won't strike the primers. Its a Winchester Big Bore 94 in 356 Winchester. We check fired it over the summer and I cleaned the barrel and oiled it. When she took it out for deer season Saturday, and tried to shoot a deer, the hammer did not dent the primer. It looks to me like maybe the little button that the lever pushes up on to allow it to shoot is stuck and you can't raise the lever as far as it used to go. Is there a way to take this apart to clean it all up and oil it? On my other 94 rifle, the lever depresses this button all the way so the lever comes to the stock.