07-01-2022, 10:51 PM
Bret,
They look identical - four ridges on each case. Looks like brass has splayed under pressure into four machined channels. If this is the reason then you will be able to see or feel the channels with a paper clip.
It is probably a quality control issue by the manufacturer. Maybe swarf wasn't cleaned out as the reamer cut. It could also be the channels from four earlier case separations. If it is case separation then that means it has been previously fired. Case separations cut permanent trenches that size, but tend to happen lower on the case.
Who's the manufacturer?
They look identical - four ridges on each case. Looks like brass has splayed under pressure into four machined channels. If this is the reason then you will be able to see or feel the channels with a paper clip.
It is probably a quality control issue by the manufacturer. Maybe swarf wasn't cleaned out as the reamer cut. It could also be the channels from four earlier case separations. If it is case separation then that means it has been previously fired. Case separations cut permanent trenches that size, but tend to happen lower on the case.
Who's the manufacturer?