I have a gun I inherited from my father. It is a model 51 JC Higgens Mauser 30-06 that was marketed through Sears back in the 50's and 60's. It is a comercial varient of the Model 98 Mauser. Mine was made in Belguim by FN. The problem I'm having is that when I cock the bolt it will fire on it's own if I turn the safety on and then attempt to release it, or if I try raising the bolt once it is already cocked. I went online for instruction on how to disassemble the bolt and examine it which I did. Inspected, cleaned and put it back together but didn't help. Any help or info would be appreciated.