Midway Satern 6.5 Grendel barrels

[vfrdrvr]

Based on examination of fired brass from Grendel and LBC chambers, I don't think the shoulder angles of the chambers are the same.

The loaded cartridges are/should be identical. The only difference in fired brass I've seen is the necks from those fired in Grendel chambers run about .298 - .299 and brass from my LBC about .294. If there's a difference in the shoulder I don't see it. I haven't seen a reamer/chamber print for a G. I have one from PTG for the LBC. Shoulder angle is 30, which is what I recall seeing for the Grendel. Neck diameter is .295. Perhaps Bill A will post a print for the G.

I guess it's possible what you're seeing is the neck on Grendel fired brass being blown out farther than the LBC. If so, you have micrometer calibrated eyes.

The real issue, for me at least, is the bolt depth/headspacing difference. The other stuff is pretty inconsequential.