I have never used a better case than RWS.
Many years ago shooting a 30 Gibbs I really got tired of fire forming cases after 3 shots using our throw away case made in this country. Someone turned me onto the 7X65 R RWS case. I now use the 5.6 X 57,7X57 280 Rem,6.5X65 which is .005 larger in diameter than the Rimmed 7 X 65., 06 and 9.3 X 74R brass.
I have never lost an RWS case and I was driving them to short Mag pressures and velocities well before the short Mag craze.
The case on the left is a 6 Rem case. The next 3 going right are formed 224 minicoop cases with 30 degree shoulder. The case all the way to the right is a 338 Gibbs with 35 degree shoulder.
One can not go wrong with RWS case's.