04-30-2023, 01:47 AM
To answer OP's question -
The case can handle 62kpsi.
But the AR-15 style bolt can occasionally shear off a lug if the bolt is weak or if the upper isn't squared perfectly.
So both grendel and ARC are set at 52kpsi to keep bolt thrust down.
That being said, some people with well crafted AR's and very high quality bolts have run bolt gun pressures without failure. There are some extra beefed up bolts out there that exist.
The words AT OWN RISK apply.
The case can handle 62kpsi.
But the AR-15 style bolt can occasionally shear off a lug if the bolt is weak or if the upper isn't squared perfectly.
So both grendel and ARC are set at 52kpsi to keep bolt thrust down.
That being said, some people with well crafted AR's and very high quality bolts have run bolt gun pressures without failure. There are some extra beefed up bolts out there that exist.
The words AT OWN RISK apply.