Was shooting with a friend and he had a case completely separate in the chamber of his new 365. The head is long gone, but the rest of the case is still in the barrel.

This was with a reload of his.

9mm reloads depend upon pressure/accuracy you are seeking. I usually start seeing problems around the 5-6th load on some manuf. I toss when you start seeing a line being pushed together or you see the look of a mushroom near the headcase area. Both signs the brass should be discarded.