Starline Brass Unprimed Cases 40-65 Winchester 100/Pack This Obsolete Vintage Cartridge Was Originally Designed For Use With Both Smokeless And Black Powder. Our Case Is properly Sized To Fit In Even The tightest Chambers. Internal Capacity Is Similar To That Of Winchester Brass. Wall Thickness at Mouth Is .0095" Average. Type: Unprimed Case Material: Brass Style: Large Length: 2.097"-2.104" Gun Type: Rifle Metal Type: Brass Caliber Or Gauge: 40-65 Winchester Quantity: 100 Per Bag Recommended Usage: Reloading