Extraction issue. Need advice.
New custom barrel from renowned maker. Chambered in 6mm Creedmoor with a 1:8 twist. Only 120 rounds through the barrel, break in and load development. Reloder 16, CCIBR4, Peterson SRP brass new and the 108 ELDM. Developed a load with avg velocities 2955 fps with no pressure signs. Then all of a sudden, very stiff bolt lifts, brass and primer show no signs of pressure. Load has not changed and environmental temperatures aren’t at extreme opposites (fairly consistent). I tested lighter loads and they still produce stiff bolt lifts. I tested the load in another 6 Creedmoor I have and no issues. Barrel is mounted on a Rem 700 Stainless steel action, brand new.
Additional info: I’ve kept data on fired brass measurements and nothing has changed. Load development has always been performed within recommended powder charges, I’ve never loaded hot and been reloading since 2009. Competed in PRS and Sniper competitions with my handloads. Never had an issue. I’ve inspected the bolt to the best of my capabilities and the chamber using a bore scope and nothing odd was seen.
Worst part, is that the stiffness of the bolt lift is now at a point where I have to slam the bolt handle to get it to go up. I’ve stopped shooting
Any advice would be appreciated.
Thx
New custom barrel from renowned maker. Chambered in 6mm Creedmoor with a 1:8 twist. Only 120 rounds through the barrel, break in and load development. Reloder 16, CCIBR4, Peterson SRP brass new and the 108 ELDM. Developed a load with avg velocities 2955 fps with no pressure signs. Then all of a sudden, very stiff bolt lifts, brass and primer show no signs of pressure. Load has not changed and environmental temperatures aren’t at extreme opposites (fairly consistent). I tested lighter loads and they still produce stiff bolt lifts. I tested the load in another 6 Creedmoor I have and no issues. Barrel is mounted on a Rem 700 Stainless steel action, brand new.
Additional info: I’ve kept data on fired brass measurements and nothing has changed. Load development has always been performed within recommended powder charges, I’ve never loaded hot and been reloading since 2009. Competed in PRS and Sniper competitions with my handloads. Never had an issue. I’ve inspected the bolt to the best of my capabilities and the chamber using a bore scope and nothing odd was seen.
Worst part, is that the stiffness of the bolt lift is now at a point where I have to slam the bolt handle to get it to go up. I’ve stopped shooting
Any advice would be appreciated.
Thx