I have a L46 222 heavy barrel. It has the square block bolt head. When not cocked, the bolt handle raises hard at the start. The the diagonal cam under the bolt handle looks galled. Definitely not good looking. I am not familiar with this bolt like I am with Rem 721 and Win 70. How is the disassembly accomplished? I am not sure if there is a solution other than to smooth the cam and keep it lubed. Any other ideas/fixes?