20 factory new REMINGTON unprimed 30 Carbine (.30 M1) brass rifle cases.
Odd numbers of cartridge cases is the result of bulk bagging. Bulk brass is sold in barrels, generally by weight and it is not uncommon for odd number of pieces remain.
HISTORY: Designed for use by the US military as a light carbine in the 1940’s, the .30 carbine was used in the venerable M1 Carbine and the full auto M2 version. The gun of choice for many soldiers in WW11 the M1 is still very popular today. Ruger also offers the .30 Carbine in their popular Blackhawk revolver and new M1’s are available from Auto-Ordnance.
Brass case mouths MAY not be perfectly round from the manufacturing process, this can be corrected by running brass through the size die (always recommended) prior to loading. Residue from the annealing process may leave a stain on the case neck that can be removed by tumbling. Annealing involves rapid heating then cooling to impart the shell cases with the proper hardness to securely hold bullets in place and provides flexibility to expand and contract through multiple firings handloaders expect.