.This brass is formed from all once fired Nickel cases

.Mixed year

.Deprimed swaged  formed and trimmed to +/- .003 of 1.390

.Stainless polished

.Depending on your chamber dimensions these may require neck turning

.I load and shoot a CZ 527 in 221 fireball & have tested this brass myself with the necks turned to .012 to 3400fps pushing a 40 nosler without failure.