The.38-55 is the standard length of 2.080" which is the same as winchester case.Case mouth has thinner walls (.0072" average thickness at mouth) than the winchester case allowing for use of the wide variety of bullet diameters, especially in tight chamber/large bore situations.Recommended Usage: ReloadingType: RifleMaterial: BrassStyle: LargeLength: 2.076"-2.082"Gun Type: RifleMetal Type: BrassCaliber Or Gauge: 38-55 WinQuantity: 50 Per Bag