Barrel Torque Ludicrocity
- Bolt Action Rifles
- 221 Replies
The ramp thread from Harolds book is money. Absolutely solves the problem, EXCEPT that you will yield the action face, recoil lug or barrel shoulder. Back to square one.
Accept that it will not be tight enough to stay together (magnum diameter case @65k plus) and the right way is to make the thread and shoulder interface as perfect as we can so it can return to the same place. Advantage integral lug, advantage integral base (or no penetrating scope mounting screw), advantage high speed CNC threading, advantage perfectly orthogonal face/thread.
Lighter psi and smaller diameter case do not exp the separation issue.
FYI AR style joints are different, require a different discussion.
Takeaway is: not too tight is the right answer. Too tight should at least be determined by calculation, and stay a safety factor below. 75-100 is just right as a general spec. The friction coefficient is a HUGE player in this problem/solution also.
Barrel joint movement due to everything but recoil is the boogey man that destroys my peaceful nights!
Accept that it will not be tight enough to stay together (magnum diameter case @65k plus) and the right way is to make the thread and shoulder interface as perfect as we can so it can return to the same place. Advantage integral lug, advantage integral base (or no penetrating scope mounting screw), advantage high speed CNC threading, advantage perfectly orthogonal face/thread.
Lighter psi and smaller diameter case do not exp the separation issue.
FYI AR style joints are different, require a different discussion.
Takeaway is: not too tight is the right answer. Too tight should at least be determined by calculation, and stay a safety factor below. 75-100 is just right as a general spec. The friction coefficient is a HUGE player in this problem/solution also.
Barrel joint movement due to everything but recoil is the boogey man that destroys my peaceful nights!