Attended a range shoot a while back and spotted a chap not bothering to catch up his factory RWS .243 cases. Ended up with them after a polite approach. De-capped, FL resized, trimmed to length and re-loaded, they are hair-line fracturing longitudinally around the neck on a (starter) moderate load. Federal cases, re-loaded in the same run with the same recipe, are fine.
A bad batch of brass? Would have expected better of German manufacture.
Have others seen this?