Here is sectioned 585 HE case in the middle, we first made from
another case, years ago before we had factory run of brass and
it had perfect thickness on the sides and inside corrner.
We could fire them many times without sides thinning..
First case is factory run of our 585 HE, 3rd is case that is too
thick of sides and sticks at high pressures..
Pic of our factory run cases necked down to 375 and fired 4 times
at high pressure on the right, with unfired case on the left.
Our case is not perfect but does work...Ed