Unprimed handgun shellcases for .375 Magnum ammunition, engineered to precise tolerances to ensure smooth-feeding and positive chambering.
I dont know if this is common knowledge but this brass IS NOT ready to be reloaded out of the package. Every case had to be deburred. Most had to be trimmed to length. And the case mouths weren't even square. There were also a couple cases that were damaged from the factory. Performance was normal after loading, just know going in that standard case prep will be necessary.