I think some of you are mixing issues here so let me see if I can help clarify; case length is independent of head space. A go or no-go gauge is measuring head space which is the distance between the bolt face and a datum line on the shoulder of the case. It doesn't care about the neck length. It is possible to set head space correctly yet encounter a dangerous situation if the case neck is long enough that it is forced into the throat. This will cause the case mouth to be crimped into the bullet. This in turn will cause much higher pressures before the case mouth releases the bullet.
If the load is near maximum, and the case mouth is driven into the throat, then pressure will escalate rapidly until something gives. Usually this would be a blown primer and maybe a flame cut firing pin but could be worse.
This isn't likely with most Grendel chambers because there is ample room for the case to grow before this would occur. But not all chambers are the same. I have one early Grendel Reamer that requires a neck turn and has zero lead to the throat. With this chamber you had better trim and turn cases for or you will have major issues.
Bob
If the load is near maximum, and the case mouth is driven into the throat, then pressure will escalate rapidly until something gives. Usually this would be a blown primer and maybe a flame cut firing pin but could be worse.
This isn't likely with most Grendel chambers because there is ample room for the case to grow before this would occur. But not all chambers are the same. I have one early Grendel Reamer that requires a neck turn and has zero lead to the throat. With this chamber you had better trim and turn cases for or you will have major issues.
Bob
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