From my understanding it is very similar to the blaser, but more are for bolt lock up. They proofed mine with ammo shot at 78,000psi at the factory.There have been other bolt actions tested that have survived that pressure. The H.P. White laboratories tested the Schultz & Larsen action (used in their M54J, M60, M65, M68DL rifles) in the 1960s, and it withstood 129,000 PSI pressure. The Fortner system used in the Heym SR30 has been tested to 110,000 PSI without any problems. The Blaser R8, with its 14-lug radial collet lockup was tested at the DEVA Association laboratory in Germany and has withstood 210,000 PSI pressure.