09-23-2022, 02:38 PM
(This post was last modified: 09-23-2022, 02:53 PM by lazyengineer.)
Please post a photo of the case head. An OOB will have a lighter primer strike. I contend it is not OOB. A over-pressure will have extrusion into ejector. I contend that wont be there either - but look forward to the photo. A kaboom that is neither in Grendel, will be due to insufficient brass to contain the normal pressure in the gap between body head and chamber walls, and blow right the at the seem between the case body and head.
Here is a related thread on brass issues from earlier. Is the rifle overgassed? In the thread, another poster getting the dreaded belted brass behavior in his suggested his Odin bbl had too generous chamfer. Meaning more brass exposure to hold pressure.
https://www.65grendel.com/forum/showthre...zyengineer
I continue to suspect there is a tolerance stacking issue between Lapua, some Bbls, and overgassing, resulting in blowout at the unsupported seem. Thr most experienced Grendel shooters don't seem to experience this blowout - but others apparently do.
Here is a related thread on brass issues from earlier. Is the rifle overgassed? In the thread, another poster getting the dreaded belted brass behavior in his suggested his Odin bbl had too generous chamfer. Meaning more brass exposure to hold pressure.
https://www.65grendel.com/forum/showthre...zyengineer
I continue to suspect there is a tolerance stacking issue between Lapua, some Bbls, and overgassing, resulting in blowout at the unsupported seem. Thr most experienced Grendel shooters don't seem to experience this blowout - but others apparently do.