Anyone hear of Grendel II using a 6.5x47 Laupa throat?

[Tedward]

Thanks for that. I assume you meant -.001 too small. I always figured there would be that much variation in manufacturing and didn't think that would be enough to cause problems BUT I am extremely new to the Grendel and compound chamber stuff.
I would think the problem would be from the latter more so though, Using tooling long past it's effective life span especially after hearing about visible chatter marks.

Maybe that is what the reamer manufacture did in his math equation, went the wrong way....