Actually, even a small hole gage is problematic in measuring bore size. The best method is with a series of pin or plug gages. I believe this was mentioned in the AR thread. That will give a true reading of bore dimensions.

Unfortunately, JES has not responded to either of these threads. His input is very important. I find it difficult to believe that only these two rifles have undersized bores since, it can be assumed all are done with the same tooling.

Jim H.